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adds matrix i2c swap

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This commit is contained in:
Jack Humbert 2018-02-14 15:35:24 -05:00
parent be81cd8c98
commit 7d59f83b2e
4 changed files with 70 additions and 42 deletions
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52
drivers/arm/twi2c.c
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@ -21,6 +21,7 @@
#include "chprintf.h"
#include "memstreams.h"
#include "printf.h"
#include "matrix.h"
#ifndef I2C_DRIVER
#define I2C_DRIVER I2CD1
@ -37,13 +38,7 @@
* 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 = {
static const I2CConfig uniI2CConfig = {
STM32_TIMINGR_PRESC(15U) |
STM32_TIMINGR_SCLDEL(4U) | STM32_TIMINGR_SDADEL(2U) |
STM32_TIMINGR_SCLH(15U) | STM32_TIMINGR_SCLL(21U),
@ -119,11 +114,10 @@ void catchError(I2CDriver *i2cp)
noteI2cError(i2cp->errors);
}
extern void matrix_copy(matrix_row_t * copy);
const char hexString[16] = "0123456789abcdef";
/**
* Message processor - looks at received message, determines reply as quickly as possible
*
@ -132,36 +126,18 @@ const char hexString[16] = "0123456789abcdef";
* 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 *txPtr = txBody;
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;
if (len >= 2 && rxBody[0] == 0x01 && rxBody[1] == 0x00) {
matrix_row_t matrix[MATRIX_ROWS / 2];
matrix_copy(matrix);
memcpy(txPtr, matrix, MATRIX_ROWS / 2);
txLen = MATRIX_ROWS / 2;
}
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);
}
@ -193,7 +169,7 @@ void twi2c_slave_init(void) {
palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_PUPDR_PULLUP);
i2cStart(&I2C_DRIVER, &slaveI2Cconfig);
i2cStart(&I2C_DRIVER, &uniI2CConfig);
#if HAL_USE_I2C_SLAVE
I2C_DRIVER.slaveTimeout = MS2ST(100); // Time for complete message
#endif
@ -215,3 +191,11 @@ void twi2c_slave_task(void) {
printf("I2cError: %04x\r\n", lastI2cErrorFlags);
}
}
void twi2c_master_init(void) {
i2cStart(&I2C_DRIVER, &uniI2CConfig);
}
msg_t twi2c_master_send(i2caddr_t address, const uint8_t * txbuf, uint8_t * rxbuf, systime_t timeout) {
return i2cMasterTransmitTimeout(&I2C_DRIVER, address, txbuf, sizeof(txbuf), rxbuf, sizeof(rxbuf), timeout);
}