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adds i2c slave implementation

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This commit is contained in:
Jack Humbert 2018-02-10 16:32:05 -05:00
parent b075df1c87
commit be81cd8c98
11 changed files with 300 additions and 63 deletions
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11
common_features.mk
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@ -20,6 +20,12 @@ SERIAL_SRC += $(wildcard $(SERIAL_PATH)/system/*.c)
SERIAL_DEFS += -DSERIAL_LINK_ENABLE
COMMON_VPATH += $(SERIAL_PATH)
ifeq ($(PLATFORM),AVR)
COMMON_VPATH += $(DRIVER_PATH)/avr
else
COMMON_VPATH += $(DRIVER_PATH)/arm
endif
ifeq ($(strip $(API_SYSEX_ENABLE)), yes)
OPT_DEFS += -DAPI_SYSEX_ENABLE
SRC += $(QUANTUM_DIR)/api/api_sysex.c
@ -184,6 +190,11 @@ ifeq ($(strip $(USB_HID_ENABLE)), yes)
include $(TMK_DIR)/protocol/usb_hid.mk
endif
ifeq ($(strip $(I2C_SLAVE_ENABLE)), yes)
SRC += twi2c.c
OPT_DEFS += -DI2C_SLAVE_ENABLE
endif
QUANTUM_SRC:= \
$(QUANTUM_DIR)/quantum.c \
$(QUANTUM_DIR)/keymap_common.c \

194
drivers/arm/twi2c.c
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@ -15,19 +15,203 @@
*/
#include "twi2c.h"
#include <string.h>
#include <hal.h>
#include "hal_i2cslave.h"
#include "chprintf.h"
#include "memstreams.h"
#include "printf.h"
#ifndef I2C_DRIVER
#define I2C_DRIVER &I2CD1
#define I2C_DRIVER I2CD1
#endif
static const I2CConfig i2cconfig = {
/**
* I2C slave test routine.
*
* To use: Add file to a project, call startComms() with the address of a serial stream
*
* There are two different responses:
* a) A read-only transaction - returns the "Initial Reply" message
* b) A write then read transaction - calls a message processor and returns the generated reply.
* Stretches clock until reply available.
*/
#define slaveI2Caddress 0x30 /* Address in our terms - halved by later code */
//#define myOtherI2Caddress 0x19
I2CSlaveMsgCB twi2c_slave_message_process, catchError, clearAfterSend;
static const I2CConfig slaveI2Cconfig = {
STM32_TIMINGR_PRESC(15U) |
STM32_TIMINGR_SCLDEL(4U) | STM32_TIMINGR_SDADEL(2U) |
STM32_TIMINGR_SCLH(15U) | STM32_TIMINGR_SCLL(21U),
0,
0
0,
NULL
};
void twi2c_init(void) {
i2cStart(I2C_DRIVER, &i2cconfig);
char initialReplyBody[50] = "Initial reply"; // 'Status' response if read without preceding write
uint32_t messageCounter = 0; /* Counts number of messages received to return as part of response */
uint8_t rxBody[240]; /* stores last message master sent us (intentionally a few bytes smaller than txBody) */
uint8_t txBody[256]; /* Return message buffer for computed replies */
BaseSequentialStream *chp = NULL; // Used for serial logging
// Handler when something sent to us
const I2CSlaveMsg echoRx =
{
sizeof(rxBody), /* max sizeof received msg body */
rxBody, /* body of received msg */
NULL, /* do nothing on address match */
twi2c_slave_message_process, /* Routine to process received messages */
catchError /* Error hook */
};
// 'Empty' reply when nothing to say, and no message received. In RAM, to allow update
I2CSlaveMsg initialReply =
{
sizeof(initialReplyBody), /* trailing zero byte will be repeated as needed */
(uint8_t *)initialReplyBody,
NULL, /* do nothing on address match */
NULL, /* do nothing after reply sent */
catchError /* Error hook */
};
// Response to received messages
I2CSlaveMsg echoReply = { /* this is in RAM so size may be updated */
0, /* filled in with the length of the message to send */
txBody, /* Response message */
NULL, /* do nothing special on address match */
clearAfterSend, /* Clear receive buffer once replied */
catchError /* Error hook */
};
/**
* Track I2C errors
*/
uint8_t gotI2cError = 0;
uint32_t lastI2cErrorFlags = 0;
// Called from ISR to log error
void noteI2cError(uint32_t flags)
{
lastI2cErrorFlags = flags;
gotI2cError = 1;
}
/**
* Generic error handler
*
* Called in interrupt context, so need to watch what we do
*/
void catchError(I2CDriver *i2cp)
{
noteI2cError(i2cp->errors);
}
const char hexString[16] = "0123456789abcdef";
/**
* Message processor - looks at received message, determines reply as quickly as possible
*
* Responds with the value of the messageCounter (in hex), followed by the received message in [..]
*
* Note: Called in interrupt context, so need to be quick!
*/
void twi2c_slave_message_process(I2CDriver *i2cp) {
uint8_t i;
uint8_t *txPtr = txBody + 8;
uint8_t txLen;
uint32_t curCount;
size_t len = i2cSlaveBytes(i2cp); // Number of bytes received
if (len >= sizeof(rxBody))
len = sizeof(rxBody)-1;
rxBody[len]=0; // String termination sometimes useful
/* A real-world application would read and decode the message in rxBody, then generate an appropriate reply in txBody */
curCount = ++messageCounter;
txLen = len + 11; // Add in the overhead
for (i = 0; i < 8; i++)
{
*--txPtr = hexString[curCount & 0xf];
curCount = curCount >> 4;
}
txPtr = txBody + 8;
*txPtr++ = ' ';
*txPtr++ = '[';
memcpy(txPtr, rxBody, len); // Echo received message
txPtr += len;
*txPtr++ = ']';
*txPtr = '\0';
/** Message ready to go here */
echoReply.size = txLen;
i2cSlaveReplyI(i2cp, &echoReply);
}
/**
* Callback after sending of response complete - restores default reply in case polled
*/
void clearAfterSend(I2CDriver *i2cp)
{
echoReply.size = 0; // Clear receive message
i2cSlaveReplyI(i2cp, &initialReply);
}
/**
* Start the I2C Slave port to accept comms from master CPU
*
* We then go into a loop checking for errors, and never return
*/
void twi2c_slave_init(void) {
palSetGroupMode(GPIOB,8,9, PAL_MODE_INPUT); // Try releasing special pins for a short time
chThdSleepMilliseconds(10);
/* I2C1 SCL on PF1, SDA on PF0 */
palSetPadMode(GPIOB, 9, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
i2cStart(&I2C_DRIVER, &slaveI2Cconfig);
#if HAL_USE_I2C_SLAVE
I2C_DRIVER.slaveTimeout = MS2ST(100); // Time for complete message
#endif
i2cSlaveConfigure(&I2C_DRIVER, &echoRx, &initialReply);
// Enable match address after everything else set up
i2cMatchAddress(&I2C_DRIVER, slaveI2Caddress/2);
// i2cMatchAddress(&I2C_DRIVER, myOtherI2Caddress/2);
// i2cMatchAddress(&I2C_DRIVER, 0); /* "all call" */
printf("Slave I2C started\n\r");
}
void twi2c_slave_task(void) {
if (gotI2cError) {
gotI2cError = 0;
printf("I2cError: %04x\r\n", lastI2cErrorFlags);
}
}

2
keyboards/_qmk_handwire/boards/GENERIC_STM32_F303XC/board.h
View File

@ -539,7 +539,7 @@
PIN_PUPDR_PULLUP(GPIOC_PIN10) | \
PIN_PUPDR_PULLUP(GPIOC_PIN11) | \
PIN_PUPDR_PULLUP(GPIOC_PIN12) | \
PIN_PUPDR_PULLUP(GPIOC_PIN13) | \
PIN_PUPDR_FLOATING(GPIOC_PIN13) | \
PIN_PUPDR_FLOATING(GPIOC_PIN14) | \
PIN_PUPDR_FLOATING(GPIOC_PIN15))
#define VAL_GPIOC_ODR (PIN_ODR_HIGH(GPIOC_PIN0) | \

7
keyboards/_qmk_handwire/config.h
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@ -126,8 +126,11 @@
/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
//#define MIDI_TONE_KEYCODE_OCTAVES 1
#endif
/* Backlight configuration
*/
#define BACKLIGHT_LEVELS 1
#define NO_USB_STARTUP_CHECK
#endif

7
keyboards/_qmk_handwire/halconf.h
View File

@ -79,6 +79,13 @@
#define HAL_USE_I2C TRUE
#endif
/**
* @brief Enables the I2C Slave subsystem.
*/
#if !defined(HAL_USE_I2C_SLAVE) || defined(__DOXYGEN__)
#define HAL_USE_I2C_SLAVE TRUE
#endif
/**
* @brief Enables the I2S subsystem.
*/

12
keyboards/_qmk_handwire/keymaps/default/keymap.c
View File

@ -34,12 +34,12 @@ enum custom_keycodes {
const uint16_t keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = KEYMAP(
KC_INS, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
KC_PGUP, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_DEL,
KC_PGDN, KC_H, KC_J, KC_K, KC_L, KC_COLN, KC_QUOT,
KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_ENT,
KC_RCTL, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT,
MO(2), MO(1), KC_SPC,
KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_0, KC_DEL,
KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_HOME,
KC_ESC, KC_A, KC_S, KC_D, KC_F, KC_G, KC_END,
KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_N,
KC_RCTL, KC_LEFT, KC_DOWN, KC_UP, KC_LGUI,
KC_SPC, MO(2), MO(1),
KC_INS, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
KC_PGUP, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_DEL,

36
keyboards/_qmk_handwire/matrix.c
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@ -8,6 +8,7 @@
#include "backlight.h"
#include "matrix.h"
#include "usb_main.h"
/* QMK Handwire
*
@ -24,6 +25,9 @@ static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static bool debouncing = false;
static uint16_t debouncing_time = 0;
static bool master = false;
static bool right_hand = false;
__attribute__ ((weak))
void matrix_init_user(void) {}
@ -44,6 +48,14 @@ void matrix_init(void) {
printf("matrix init\n");
//debug_matrix = true;
// C13 is connected to VCC on the right hand
palSetPadMode(GPIOC, 13, PAL_MODE_INPUT);
wait_us(20);
right_hand = palReadPad(GPIOC, 13);
// if USB is active, this is the master
master = (USB_DRIVER.state == USB_ACTIVE);
/* Column(sense) */
palSetPadMode(GPIOA, 13, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOA, 14, PAL_MODE_INPUT_PULLDOWN);
@ -68,9 +80,8 @@ void matrix_init(void) {
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t data = 0;
matrix_row_t matrix_scan_common(uint8_t row) {
matrix_row_t data;
// strobe row { A6, A7, B0, B1, B2, B10 }
switch (row) {
@ -106,6 +117,25 @@ uint8_t matrix_scan(void) {
case 0: palClearPad(GPIOB, 10); break;
}
return data;
}
uint8_t matrix_scan_master(void) {
}
uint8_t matrix_scan_slave(void) {
}
uint8_t matrix_scan(void) {
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t data = 0;
if (right_hand && row >= 6) {
data = matrix_scan_common(row % 6);
}
if (matrix_debouncing[row] != data) {
matrix_debouncing[row] = data;
debouncing = true;

1
keyboards/_qmk_handwire/rules.mk
View File

@ -53,3 +53,4 @@ NKRO_ENABLE = yes # USB Nkey Rollover
CUSTOM_MATRIX = yes # Custom matrix file
AUDIO_ENABLE = yes
# SERIAL_LINK_ENABLE = yes
I2C_SLAVE_ENABLE = yes

2
lib/chibios

@ -1 +1 @@
Subproject commit 587968d6cbc2b0e1c7147540872f2a67e59ca18b
Subproject commit f9643c88ad5cd0704d57bed83fe64f45b3e6be4e

2
tmk_core/avr.mk
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@ -12,8 +12,6 @@ HEX = $(OBJCOPY) -O $(FORMAT) -R .eeprom -R .fuse -R .lock -R .signature
EEP = $(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT)
BIN =
COMMON_VPATH += $(DRIVER_PATH)/avr
COMPILEFLAGS += -funsigned-char
COMPILEFLAGS += -funsigned-bitfields
COMPILEFLAGS += -ffunction-sections

5
tmk_core/protocol/chibios/main.c
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@ -135,7 +135,10 @@ int main(void) {
/* Wait until the USB or serial link is active */
while (true) {
if(USB_DRIVER.state == USB_ACTIVE) {
#if !defined(NO_USB_STARTUP_CHECK)
if(USB_DRIVER.state == USB_ACTIVE)
#endif
{
driver = &chibios_driver;
break;
}