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Merge pull request #142 from tomoveu/add-cubemx-i2c 

Add STM32 CubeMX I2C support
pull/152/head
David Garske 2021-03-10 13:29:05 -08:00 committed by GitHub
parent 17ea7058a8 0c8948cde4
commit fd79729cc8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 75 additions and 3 deletions
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78
examples/tpm_io.c
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@ -89,8 +89,10 @@
#endif
#endif
#elif defined(WOLFSSL_STM32_CUBEMX)
#ifdef WOLFTPM_I2C
#define TPM2_I2C_ADDR 0x2e
#endif
#elif defined(WOLFSSL_ATMEL)
#include "asf.h"
@ -324,7 +326,73 @@
#endif /* WOLFTPM_I2C */
#elif defined(WOLFSSL_STM32_CUBEMX)
/* STM32 CubeMX Hal */
#ifdef WOLFTPM_I2C
/* STM32 CubeMX HAL I2C */
#define STM32_CUBEMX_I2C_TIMEOUT 250
static int i2c_read(void* userCtx, word32 reg, byte* data, int len)
{
int rc;
int i2cAddr = (TPM2_I2C_ADDR << 1) | 0x01; /* For I2C read LSB is 1 */
byte buf[MAX_SPI_FRAMESIZE+1];
I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)userCtx;
/* TIS layer should never provide a buffer larger than this,
but double check for good coding practice */
if (len > MAX_SPI_FRAMESIZE)
return BAD_FUNC_ARG;
buf[0] = (reg & 0xFF);
rc = HAL_I2C_Master_Receive(&hi2c, i2cAddr, data, len, STM32_CUBEMX_I2C_TIMEOUT);
if (rc != -1) {
XMEMCPY(data, buf+1, len);
return TPM_RC_SUCCESS;
}
return TPM_RC_FAILURE;
}
static int i2c_write(void* userCtx, word32 reg, byte* data, int len)
{
int rc;
int i2cAddr = (TPM2_I2C_ADDR << 1); /* I2C write operation, LSB is 0 */
byte buf[MAX_SPI_FRAMESIZE+1];
I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)userCtx;
/* TIS layer should never provide a buffer larger than this,
but double check for good coding practice */
if (len > MAX_SPI_FRAMESIZE)
return BAD_FUNC_ARG;
buf[0] = (reg & 0xFF); /* TPM register address */
XMEMCPY(buf + 1, data, len);
rc = HAL_I2C_Master_Transmit(&hi2c, TPM2_I2C_ADDR << 1, buf, len);
if (rc != -1) {
return TPM_RC_SUCCESS;
}
return TPM_RC_FAILURE;
}
static int TPM2_IoCb_STCubeMX_I2C(TPM2_CTX* ctx, int isRead, word32 addr,
byte* buf, word16 size, void* userCtx)
{
int ret = TPM_RC_FAILURE;
if (userCtx != NULL) {
if (isRead)
ret = i2c_read(userCtx, addr, buf, size);
else
ret = i2c_write(userCtx, addr, buf, size);
}
(void)ctx;
return ret;
}
#else /* STM32 CubeMX Hal SPI */
#define STM32_CUBEMX_SPI_TIMEOUT 250
static int TPM2_IoCb_STCubeMX_SPI(TPM2_CTX* ctx, const byte* txBuf, byte* rxBuf,
word16 xferSz, void* userCtx)
@ -397,6 +465,7 @@
return ret;
}
#endif /* WOLFTPM_I2C */
#elif defined(WOLFSSL_ATMEL)
/* Atmel ASF */
@ -772,7 +841,7 @@ int TPM2_IoCb(TPM2_CTX* ctx, int isRead, word32 addr, byte* buf, word16 size,
void* userCtx)
{
int ret = TPM_RC_FAILURE;
#ifndef WOLFTPM_I2C
#if !defined(WOLFTPM_I2C)
byte txBuf[MAX_SPI_FRAMESIZE+TPM_TIS_HEADER_SZ];
byte rxBuf[MAX_SPI_FRAMESIZE+TPM_TIS_HEADER_SZ];
#endif
@ -790,6 +859,9 @@ int TPM2_IoCb(TPM2_CTX* ctx, int isRead, word32 addr, byte* buf, word16 size,
#if defined(__linux__)
/* Use Linux I2C */
ret = TPM2_IoCb_Linux_I2C(ctx, isRead, addr, buf, size, userCtx);
#elif defined(WOLFSSL_STM32_CUBEMX)
/* Use STM32 CubeMX HAL for I2C */
ret = TPM2_IoCb_STCubeMX_I2C(ctx, isRead, addr, buf, size, userCtx);
#else
/* TODO: Add your platform here for HW I2C interface */
printf("Add your platform here for HW I2C interface\n");