Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/mbed_crc_api.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 #include "crc_api.h"
lypinator 0:bb348c97df44 2 #include "device.h"
lypinator 0:bb348c97df44 3
lypinator 0:bb348c97df44 4 #include "platform/mbed_assert.h"
lypinator 0:bb348c97df44 5
lypinator 0:bb348c97df44 6 #ifdef DEVICE_CRC
lypinator 0:bb348c97df44 7
lypinator 0:bb348c97df44 8 static CRC_HandleTypeDef current_state;
lypinator 0:bb348c97df44 9 static uint32_t final_xor;
lypinator 0:bb348c97df44 10
lypinator 0:bb348c97df44 11 bool hal_crc_is_supported(const crc_mbed_config_t *config)
lypinator 0:bb348c97df44 12 {
lypinator 0:bb348c97df44 13 if (config == NULL) {
lypinator 0:bb348c97df44 14 return false;
lypinator 0:bb348c97df44 15 }
lypinator 0:bb348c97df44 16
lypinator 0:bb348c97df44 17 if (config->polynomial != POLY_32BIT_ANSI) {
lypinator 0:bb348c97df44 18 return false;
lypinator 0:bb348c97df44 19 }
lypinator 0:bb348c97df44 20
lypinator 0:bb348c97df44 21 if (config->width != 32) {
lypinator 0:bb348c97df44 22 return false;
lypinator 0:bb348c97df44 23 }
lypinator 0:bb348c97df44 24
lypinator 0:bb348c97df44 25 if ((config->final_xor != 0xFFFFFFFFU) && (config->final_xor != 0)) {
lypinator 0:bb348c97df44 26 return false;
lypinator 0:bb348c97df44 27 }
lypinator 0:bb348c97df44 28
lypinator 0:bb348c97df44 29 return true;
lypinator 0:bb348c97df44 30 }
lypinator 0:bb348c97df44 31
lypinator 0:bb348c97df44 32 void hal_crc_compute_partial_start(const crc_mbed_config_t *config)
lypinator 0:bb348c97df44 33 {
lypinator 0:bb348c97df44 34 MBED_ASSERT(hal_crc_is_supported(config));
lypinator 0:bb348c97df44 35
lypinator 0:bb348c97df44 36 __HAL_RCC_CRC_CLK_ENABLE();
lypinator 0:bb348c97df44 37
lypinator 0:bb348c97df44 38 final_xor = config->final_xor;
lypinator 0:bb348c97df44 39
lypinator 0:bb348c97df44 40 current_state.Instance = CRC;
lypinator 0:bb348c97df44 41 current_state.InputDataFormat = CRC_INPUTDATA_FORMAT_BYTES;
lypinator 0:bb348c97df44 42 current_state.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE;
lypinator 0:bb348c97df44 43 current_state.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_DISABLE;
lypinator 0:bb348c97df44 44 current_state.Init.InitValue = config->initial_xor;
lypinator 0:bb348c97df44 45 current_state.Init.CRCLength = CRC_POLYLENGTH_32B;
lypinator 0:bb348c97df44 46 current_state.Init.InputDataInversionMode =
lypinator 0:bb348c97df44 47 config->reflect_in ? CRC_INPUTDATA_INVERSION_BYTE
lypinator 0:bb348c97df44 48 : CRC_INPUTDATA_INVERSION_NONE;
lypinator 0:bb348c97df44 49 current_state.Init.OutputDataInversionMode =
lypinator 0:bb348c97df44 50 config->reflect_out ? CRC_OUTPUTDATA_INVERSION_ENABLE
lypinator 0:bb348c97df44 51 : CRC_OUTPUTDATA_INVERSION_DISABLE;
lypinator 0:bb348c97df44 52
lypinator 0:bb348c97df44 53 HAL_CRC_Init(&current_state);
lypinator 0:bb348c97df44 54 }
lypinator 0:bb348c97df44 55
lypinator 0:bb348c97df44 56 void hal_crc_compute_partial(const uint8_t *data, const size_t size)
lypinator 0:bb348c97df44 57 {
lypinator 0:bb348c97df44 58 if (data && size) {
lypinator 0:bb348c97df44 59 HAL_CRC_Accumulate(&current_state, (uint32_t *)data, size);
lypinator 0:bb348c97df44 60 }
lypinator 0:bb348c97df44 61 }
lypinator 0:bb348c97df44 62
lypinator 0:bb348c97df44 63 uint32_t hal_crc_get_result(void)
lypinator 0:bb348c97df44 64 {
lypinator 0:bb348c97df44 65 const uint32_t result = current_state.Instance->DR;
lypinator 0:bb348c97df44 66
lypinator 0:bb348c97df44 67 return (final_xor == 0xFFFFFFFFU) ? ~result : result;
lypinator 0:bb348c97df44 68 }
lypinator 0:bb348c97df44 69
lypinator 0:bb348c97df44 70 #endif // DEVICE_CRC