diff --git a/targets/TARGET_STM/mbed_crc_api.c b/targets/TARGET_STM/mbed_crc_api.c index d4c564d816..061c4ee468 100644 --- a/targets/TARGET_STM/mbed_crc_api.c +++ b/targets/TARGET_STM/mbed_crc_api.c @@ -10,22 +10,29 @@ static uint32_t final_xor; static uint32_t crc_mask; /* STM32 CRC preipheral features - +-------------------------+-----------------------+-------------------------------+ - | Feature | F1/L1/F2/F4 series | F0/L0/F3/L4/F7/H7 or newer | - +-========================+=======================+===============================+ + +-------------------------+-----------------------+---------------+---------------+ + | Feature | F1/L1/F2/F4 series | F0 series (#1)| L0/F3/L4/F7 | + +-========================+=======================+===============+===============+ | Reversibility option | NO | YES | | on I/O data | | | - +-------------------------+-----------------------+-------------------------------+ - | CRC initial Value | Fixed to 0xFFFFFFFF | Programmable on 8, 16, 32 | - | | | bits | - +-------------------------+-----------------------+-------------------------------+ - | Handled data size in bit| 32 | 8, 16, 32 | - +-------------------------+-----------------------+-------------------------------+ - | Polynomial size in bit | 32 | 7, 8, 16, 32 | - +-------------------------+-----------------------+-------------------------------+ - | Polynomial coefficients | Fixed to 0x4C11DB7 | Programmable | - +-------------------------+-----------------------+-------------------------------+ - */ + +-------------------------+-----------------------+---------------+---------------+ + | CRC initial Value | Fixed to 0xFFFFFFFF | Programmable | Programmable | + | | | on 32 bits | on 8,16,32 | + +-------------------------+-----------------------+---------------+---------------+ + | Handled data size in bit| 32 | 8,16,32 | + +-------------------------+---------------------------------------+---------------+ + | Polynomial size in bit | 32 | 7,8,16,32 | + +-------------------------+---------------------------------------+---------------+ + | Polynomial coefficients | Fixed to 0x4C11DB7 | Programmable | + +-------------------------+---------------------------------------+---------------+ + + #1 The STM32F0 series which supported polynomial in 7, 8, 16, 32 bits as below list: + STM32F071xB + STM32F072xB + STM32F078xx + STM32F091xC + STM32F098xx +*/ bool hal_crc_is_supported(const crc_mbed_config_t *config) { if (config == NULL) { @@ -36,6 +43,10 @@ bool hal_crc_is_supported(const crc_mbed_config_t *config) /* Currently, mbed supported input data format fix on bytes, so those devices are not supported at default. */ return false; +#elif !defined(CRC_POLYLENGTH_7B) + /* Some targets are not support polynomial in 7, 8, 16 bits, ex. STMF070RB, + so those devices are not supported at default. */ + return false; #else if (config->width != 32 && config->width != 16 && config->width != 8 && config->width != 7) { return false; @@ -59,10 +70,10 @@ void hal_crc_compute_partial_start(const crc_mbed_config_t *config) crc_mask = get_crc_mask(config->width); current_state.Instance = CRC; -#if !defined(TARGET_STM32F1) && !defined(TARGET_STM32F2) && !defined(TARGET_STM32F4) && !defined(TARGET_STM32L1) +#if !defined(TARGET_STM32F1) && !defined(TARGET_STM32F2) && !defined(TARGET_STM32F4) && !defined(TARGET_STM32L1) && defined(CRC_POLYLENGTH_7B) current_state.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES; - current_state.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_DISABLE; current_state.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE; + current_state.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_DISABLE; current_state.Init.InitValue = config->initial_xor; current_state.Init.GeneratingPolynomial = config->polynomial; @@ -109,7 +120,7 @@ uint32_t hal_crc_get_result(void) { uint32_t result = current_state.Instance->DR; -#if !defined(TARGET_STM32F1) && !defined(TARGET_STM32F2) && !defined(TARGET_STM32F4) && !defined(TARGET_STM32L1) +#if !defined(TARGET_STM32F1) && !defined(TARGET_STM32F2) && !defined(TARGET_STM32F4) && !defined(TARGET_STM32L1) && defined(CRC_POLYLENGTH_7B) /* The CRC-7 SD needs to shift left by 1 bit after obtaining the result, but the output * inversion of CRC peripheral will convert the result before shift left by 1 bit, so * the result seems to have shifted after the conversion.