Add SPI 25xx EEPROM support. (#8780)
This commit is contained in:
parent
4604c70c4c
commit
54b04d9665
7 changed files with 368 additions and 20 deletions
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@ -70,7 +70,7 @@ ifeq ($(strip $(POINTING_DEVICE_ENABLE)), yes)
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SRC += $(QUANTUM_DIR)/pointing_device.c
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endif
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VALID_EEPROM_DRIVER_TYPES := vendor custom transient i2c
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VALID_EEPROM_DRIVER_TYPES := vendor custom transient i2c spi
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EEPROM_DRIVER ?= vendor
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ifeq ($(filter $(EEPROM_DRIVER),$(VALID_EEPROM_DRIVER_TYPES)),)
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$(error EEPROM_DRIVER="$(EEPROM_DRIVER)" is not a valid EEPROM driver)
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@ -85,6 +85,11 @@ else
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COMMON_VPATH += $(DRIVER_PATH)/eeprom
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QUANTUM_LIB_SRC += i2c_master.c
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SRC += eeprom_driver.c eeprom_i2c.c
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else ifeq ($(strip $(EEPROM_DRIVER)), spi)
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OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_SPI
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COMMON_VPATH += $(DRIVER_PATH)/eeprom
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QUANTUM_LIB_SRC += spi_master.c
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SRC += eeprom_driver.c eeprom_spi.c
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else ifeq ($(strip $(EEPROM_DRIVER)), transient)
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OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
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COMMON_VPATH += $(DRIVER_PATH)/eeprom
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@ -1,4 +1,4 @@
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# EEPROM Driver Configuration
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# EEPROM Driver Configuration :id=eeprom-driver-configuration
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The EEPROM driver can be swapped out depending on the needs of the keyboard, or whether extra hardware is present.
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@ -6,15 +6,20 @@ Driver | Description
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-----------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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`EEPROM_DRIVER = vendor` (default) | Uses the on-chip driver provided by the chip manufacturer. For AVR, this is provided by avr-libc. This is supported on ARM for a subset of chips -- STM32F3xx, STM32F1xx, and STM32F072xB will be emulated by writing to flash. STM32L0xx and STM32L1xx will use the onboard dedicated true EEPROM. Other chips will generally act as "transient" below.
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`EEPROM_DRIVER = i2c` | Supports writing to I2C-based 24xx EEPROM chips. See the driver section below.
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`EEPROM_DRIVER = spi` | Supports writing to SPI-based 25xx EEPROM chips. See the driver section below.
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`EEPROM_DRIVER = transient` | Fake EEPROM driver -- supports reading/writing to RAM, and will be discarded when power is lost.
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## Vendor Driver Configuration
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## Vendor Driver Configuration :id=vendor-eeprom-driver-configuration
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#### STM32 L0/L1 Configuration :id=stm32l0l1-eeprom-driver-configuration
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!> Resetting EEPROM using an STM32L0/L1 device takes up to 1 second for every 1kB of internal EEPROM used.
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No configurable options are available.
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`config.h` override | Description | Default Value
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------------------------------------|--------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------
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`#define STM32_ONBOARD_EEPROM_SIZE` | The size of the EEPROM to use, in bytes. Erase times can be high, so it's configurable here, if not using the default value. | Minimum required to cover base _eeconfig_ data, or `1024` if VIA is enabled.
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## I2C Driver Configuration
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## I2C Driver Configuration :id=i2c-eeprom-driver-configuration
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Currently QMK supports 24xx-series chips over I2C. As such, requires a working i2c_master driver configuration. You can override the driver configuration via your config.h:
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@ -41,7 +46,21 @@ MB85RC256V FRAM | `#define EEPROM_I2C_MB85RC256V` | <https://www.adafruit.com/p
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?> If you find that the EEPROM is not cooperating, ensure you've correctly shifted up your EEPROM address by 1. For example, the datasheet might state the address as `0b01010000` -- the correct value of `EXTERNAL_EEPROM_I2C_BASE_ADDRESS` needs to be `0b10100000`.
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## Transient Driver configuration
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## SPI Driver Configuration :id=spi-eeprom-driver-configuration
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Currently QMK supports 25xx-series chips over SPI. As such, requires a working spi_master driver configuration. You can override the driver configuration via your config.h:
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`config.h` override | Description | Default Value
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-----------------------------------------------|--------------------------------------------------------------------------------------|--------------
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`#define EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN` | SPI Slave select pin in order to inform that the EEPROM is currently being addressed | _none_
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`#define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR` | Clock divisor used to divide the peripheral clock to derive the SPI frequency | `64`
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`#define EXTERNAL_EEPROM_BYTE_COUNT` | Total size of the EEPROM in bytes | 8192
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`#define EXTERNAL_EEPROM_PAGE_SIZE` | Page size of the EEPROM in bytes, as specified in the datasheet | 32
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`#define EXTERNAL_EEPROM_ADDRESS_SIZE` | The number of bytes to transmit for the memory location within the EEPROM | 2
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!> There's no way to determine if there is an SPI EEPROM actually responding. Generally, this will result in reads of nothing but zero.
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## Transient Driver configuration :id=transient-eeprom-driver-configuration
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The only configurable item for the transient EEPROM driver is its size:
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@ -20,19 +20,19 @@
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#include "eeprom_driver.h"
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uint8_t eeprom_read_byte(const uint8_t *addr) {
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uint8_t ret;
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uint8_t ret = 0;
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eeprom_read_block(&ret, addr, 1);
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return ret;
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}
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uint16_t eeprom_read_word(const uint16_t *addr) {
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uint16_t ret;
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uint16_t ret = 0;
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eeprom_read_block(&ret, addr, 2);
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return ret;
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}
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uint32_t eeprom_read_dword(const uint32_t *addr) {
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uint32_t ret;
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uint32_t ret = 0;
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eeprom_read_block(&ret, addr, 4);
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return ret;
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}
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@ -50,7 +50,7 @@ static inline void init_i2c_if_required(void) {
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}
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static inline void fill_target_address(uint8_t *buffer, const void *addr) {
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intptr_t p = (intptr_t)addr;
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uintptr_t p = (uintptr_t)addr;
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for (int i = 0; i < EXTERNAL_EEPROM_ADDRESS_SIZE; ++i) {
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buffer[EXTERNAL_EEPROM_ADDRESS_SIZE - 1 - i] = p & 0xFF;
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p >>= 8;
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@ -60,11 +60,19 @@ static inline void fill_target_address(uint8_t *buffer, const void *addr) {
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void eeprom_driver_init(void) {}
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void eeprom_driver_erase(void) {
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#ifdef CONSOLE_ENABLE
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uint32_t start = timer_read32();
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#endif
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uint8_t buf[EXTERNAL_EEPROM_PAGE_SIZE];
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memset(buf, 0x00, EXTERNAL_EEPROM_PAGE_SIZE);
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for (intptr_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
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eeprom_write_block(buf, (void *)addr, EXTERNAL_EEPROM_PAGE_SIZE);
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for (uint32_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
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eeprom_write_block(buf, (void *)(uintptr_t)addr, EXTERNAL_EEPROM_PAGE_SIZE);
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}
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#ifdef CONSOLE_ENABLE
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dprintf("EEPROM erase took %ldms to complete\n", ((long)(timer_read32() - start)));
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#endif
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}
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void eeprom_read_block(void *buf, const void *addr, size_t len) {
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@ -72,8 +80,8 @@ void eeprom_read_block(void *buf, const void *addr, size_t len) {
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fill_target_address(complete_packet, addr);
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init_i2c_if_required();
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i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE, 100);
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i2c_receive(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), buf, len, 100);
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i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE, 100);
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i2c_receive(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), buf, len, 100);
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#ifdef DEBUG_EEPROM_OUTPUT
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dprintf("[EEPROM R] 0x%04X: ", ((int)addr));
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@ -85,14 +93,14 @@ void eeprom_read_block(void *buf, const void *addr, size_t len) {
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}
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void eeprom_write_block(const void *buf, void *addr, size_t len) {
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uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + EXTERNAL_EEPROM_PAGE_SIZE];
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uint8_t *read_buf = (uint8_t *)buf;
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intptr_t target_addr = (intptr_t)addr;
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uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + EXTERNAL_EEPROM_PAGE_SIZE];
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uint8_t * read_buf = (uint8_t *)buf;
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uintptr_t target_addr = (uintptr_t)addr;
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init_i2c_if_required();
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while (len > 0) {
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intptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
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int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
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uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
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int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
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if (write_length > len) {
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write_length = len;
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}
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@ -110,7 +118,7 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
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dprintf("\n");
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#endif // DEBUG_EEPROM_OUTPUT
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i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE + write_length, 100);
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i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((uintptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE + write_length, 100);
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wait_ms(EXTERNAL_EEPROM_WRITE_TIME);
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read_buf += write_length;
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231
drivers/eeprom/eeprom_spi.c
Normal file
231
drivers/eeprom/eeprom_spi.c
Normal file
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@ -0,0 +1,231 @@
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/* Copyright 2020 Nick Brassel (tzarc)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <string.h>
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/*
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Note that the implementations of eeprom_XXXX_YYYY on AVR are normally
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provided by avr-libc. The same functions are reimplemented below and are
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rerouted to the external SPI equivalent.
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Seemingly, as this is compiled from within QMK, the object file generated
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during the build overrides the avr-libc implementation during the linking
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stage.
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On other platforms such as ARM, there are no provided implementations, so
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there is nothing to override during linkage.
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*/
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#include "wait.h"
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#include "spi_master.h"
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#include "eeprom.h"
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#include "eeprom_spi.h"
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#define CMD_WREN 6
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#define CMD_WRDI 4
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#define CMD_RDSR 5
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#define CMD_WRSR 1
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#define CMD_READ 3
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#define CMD_WRITE 2
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#define SR_WIP 0x01
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// #define DEBUG_EEPROM_OUTPUT
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#ifndef EXTERNAL_EEPROM_SPI_TIMEOUT
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# define EXTERNAL_EEPROM_SPI_TIMEOUT 100
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#endif
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#ifdef CONSOLE_ENABLE
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# include "print.h"
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#endif // CONSOLE_ENABLE
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static void init_spi_if_required(void) {
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static int done = 0;
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if (!done) {
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spi_init();
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done = 1;
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}
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}
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static bool spi_eeprom_start(void) { return spi_start(EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN, EXTERNAL_EEPROM_SPI_LSBFIRST, EXTERNAL_EEPROM_SPI_MODE, EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR); }
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static spi_status_t spi_eeprom_wait_while_busy(int timeout) {
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uint32_t deadline = timer_read32() + timeout;
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spi_status_t response;
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do {
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spi_write(CMD_RDSR);
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response = spi_read();
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if (timer_read32() >= deadline) {
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return SPI_STATUS_TIMEOUT;
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}
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} while (response & SR_WIP);
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return SPI_STATUS_SUCCESS;
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}
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static void spi_eeprom_transmit_address(uintptr_t addr) {
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uint8_t buffer[EXTERNAL_EEPROM_ADDRESS_SIZE];
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for (int i = 0; i < EXTERNAL_EEPROM_ADDRESS_SIZE; ++i) {
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buffer[EXTERNAL_EEPROM_ADDRESS_SIZE - 1 - i] = addr & 0xFF;
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addr >>= 8;
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}
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spi_transmit(buffer, EXTERNAL_EEPROM_ADDRESS_SIZE);
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}
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//----------------------------------------------------------------------------------------------------------------------
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void eeprom_driver_init(void) {}
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void eeprom_driver_erase(void) {
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#ifdef CONSOLE_ENABLE
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uint32_t start = timer_read32();
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#endif
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uint8_t buf[EXTERNAL_EEPROM_PAGE_SIZE];
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memset(buf, 0x00, EXTERNAL_EEPROM_PAGE_SIZE);
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for (uint32_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
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eeprom_write_block(buf, (void *)(uintptr_t)addr, EXTERNAL_EEPROM_PAGE_SIZE);
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}
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#ifdef CONSOLE_ENABLE
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dprintf("EEPROM erase took %ldms to complete\n", ((long)(timer_read32() - start)));
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#endif
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}
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void eeprom_read_block(void *buf, const void *addr, size_t len) {
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init_spi_if_required();
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//-------------------------------------------------
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// Wait for the write-in-progress bit to be cleared
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bool res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for WIP check\n");
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memset(buf, 0, len);
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return;
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}
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spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT);
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spi_stop();
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if (response == SPI_STATUS_TIMEOUT) {
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dprint("SPI timeout for WIP check\n");
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memset(buf, 0, len);
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return;
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}
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//-------------------------------------------------
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// Perform read
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res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for read\n");
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memset(buf, 0, len);
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return;
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}
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spi_write(CMD_READ);
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spi_eeprom_transmit_address((uintptr_t)addr);
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spi_receive(buf, len);
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#ifdef DEBUG_EEPROM_OUTPUT
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dprintf("[EEPROM R] 0x%08lX: ", ((uint32_t)(uintptr_t)addr));
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for (size_t i = 0; i < len; ++i) {
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dprintf(" %02X", (int)(((uint8_t *)buf)[i]));
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}
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dprintf("\n");
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#endif // DEBUG_EEPROM_OUTPUT
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spi_stop();
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}
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void eeprom_write_block(const void *buf, void *addr, size_t len) {
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init_spi_if_required();
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bool res;
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uint8_t * read_buf = (uint8_t *)buf;
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uintptr_t target_addr = (uintptr_t)addr;
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while (len > 0) {
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uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
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int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
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if (write_length > len) {
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write_length = len;
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}
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//-------------------------------------------------
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// Wait for the write-in-progress bit to be cleared
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res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for WIP check\n");
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return;
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}
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spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT);
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spi_stop();
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if (response == SPI_STATUS_TIMEOUT) {
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dprint("SPI timeout for WIP check\n");
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return;
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}
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//-------------------------------------------------
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// Enable writes
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res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for write-enable\n");
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return;
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}
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spi_write(CMD_WREN);
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spi_stop();
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//-------------------------------------------------
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// Perform the write
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res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for write\n");
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return;
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}
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#ifdef DEBUG_EEPROM_OUTPUT
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dprintf("[EEPROM W] 0x%08lX: ", ((uint32_t)(uintptr_t)target_addr));
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for (size_t i = 0; i < write_length; i++) {
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dprintf(" %02X", (int)(uint8_t)(read_buf[i]));
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}
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dprintf("\n");
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#endif // DEBUG_EEPROM_OUTPUT
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spi_write(CMD_WRITE);
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spi_eeprom_transmit_address(target_addr);
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spi_transmit(read_buf, write_length);
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spi_stop();
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read_buf += write_length;
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target_addr += write_length;
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len -= write_length;
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}
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//-------------------------------------------------
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// Disable writes
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res = spi_eeprom_start();
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if (!res) {
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dprint("failed to start SPI for write-disable\n");
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return;
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}
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spi_write(CMD_WRDI);
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spi_stop();
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}
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80
drivers/eeprom/eeprom_spi.h
Normal file
80
drivers/eeprom/eeprom_spi.h
Normal file
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/* Copyright 2020 Nick Brassel (tzarc)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
/*
|
||||
The slave select pin of the EEPROM.
|
||||
This needs to be a normal GPIO pin_t value, such as A7.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN
|
||||
# error "No chip select pin defined -- missing EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN"
|
||||
#endif
|
||||
|
||||
/*
|
||||
The clock divisor for SPI to ensure that the MCU is within the
|
||||
specifications of the EEPROM chip. Generally this will be PCLK divided by
|
||||
the intended divisor -- check your clock settings and the datasheet of
|
||||
your EEPROM.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR
|
||||
# ifdef __AVR__
|
||||
# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 8
|
||||
# else
|
||||
# define EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR 64
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/*
|
||||
The SPI mode to communicate with the EEPROM.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_SPI_MODE
|
||||
# define EXTERNAL_EEPROM_SPI_MODE 0
|
||||
#endif
|
||||
|
||||
/*
|
||||
Whether or not the SPI communication between the MCU and EEPROM should be
|
||||
LSB-first.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_SPI_LSBFIRST
|
||||
# define EXTERNAL_EEPROM_SPI_LSBFIRST false
|
||||
#endif
|
||||
|
||||
/*
|
||||
The total size of the EEPROM, in bytes. The EEPROM datasheet will usually
|
||||
specify this value in kbits, and will require conversion to bytes.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_BYTE_COUNT
|
||||
# define EXTERNAL_EEPROM_BYTE_COUNT 8192
|
||||
#endif
|
||||
|
||||
/*
|
||||
The page size in bytes of the EEPROM, as specified in the datasheet.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_PAGE_SIZE
|
||||
# define EXTERNAL_EEPROM_PAGE_SIZE 32
|
||||
#endif
|
||||
|
||||
/*
|
||||
The address size in bytes of the EEPROM. For EEPROMs with <=256 bytes, this
|
||||
will likely be 1. For EEPROMs >256 and <=65536, this will be 2. For EEPROMs
|
||||
>65536, this will likely need to be 4.
|
||||
|
||||
As expected, consult the datasheet for specifics of your EEPROM.
|
||||
*/
|
||||
#ifndef EXTERNAL_EEPROM_ADDRESS_SIZE
|
||||
# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
|
||||
#endif
|
5
keyboards/handwired/onekey/keymaps/eep_rst/keymap.c
Normal file
5
keyboards/handwired/onekey/keymaps/eep_rst/keymap.c
Normal file
|
@ -0,0 +1,5 @@
|
|||
#include QMK_KEYBOARD_H
|
||||
|
||||
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
|
||||
LAYOUT( EEP_RST )
|
||||
};
|
Loading…
Reference in a new issue