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Add K64F Hardware CRC reference implementation 

- Add support for all currently defined polynomials
- Add 'CRC' flag to targets.json for K64F profile
pull/6708/head
Steven Cartmell 2018-04-24 15:55:10 +01:00
parent e0d98bfe2c
commit fd8b974d47
2 changed files with 126 additions and 1 deletions
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125
targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/mbed_crc_api.c Normal file
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@ -0,0 +1,125 @@
#include "crc_api.h"
#include "drivers/fsl_crc.h"
#include "platform/mbed_assert.h"
#ifdef DEVICE_CRC
static crc_bits_t width;
bool hal_crc_is_supported(const uint32_t polynomial)
{
switch (polynomial)
{
case POLY_8BIT_CCITT:
case POLY_7BIT_SD:
case POLY_16BIT_CCITT:
case POLY_16BIT_IBM:
case POLY_32BIT_ANSI:
return true;
default:
return false;
}
}
void hal_crc_compute_partial_start(const uint32_t polynomial)
{
crc_config_t config;
switch (polynomial)
{
case POLY_32BIT_ANSI:
{
width = kCrcBits32;
config.polynomial = polynomial;
config.seed = 0xFFFFFFFFU;
config.reflectIn = true;
config.reflectOut = true;
config.complementChecksum = true;
config.crcBits = width;
config.crcResult = kCrcFinalChecksum;
break;
}
case POLY_16BIT_IBM:
{
width = kCrcBits16;
config.polynomial = polynomial;
config.seed = 0;
config.reflectIn = true;
config.reflectOut = true;
config.complementChecksum = false;
config.crcBits = width;
config.crcResult = kCrcFinalChecksum;
break;
}
case POLY_16BIT_CCITT:
{
width = kCrcBits16;
config.polynomial = polynomial;
config.seed = 0xFFFFFFFFU;
config.reflectIn = false;
config.reflectOut = false;
config.complementChecksum = false;
config.crcBits = width;
config.crcResult = kCrcFinalChecksum;
break;
}
case POLY_8BIT_CCITT:
{
width = kCrcBits16;
config.polynomial = polynomial;
config.seed = 0U;
config.reflectIn = false;
config.reflectOut = false;
config.complementChecksum = false;
config.crcBits = width;
config.crcResult = kCrcFinalChecksum;
break;
}
case POLY_7BIT_SD:
{
width = kCrcBits16;
config.polynomial = polynomial;
config.seed = 0U;
config.reflectIn = false;
config.reflectOut = false;
config.complementChecksum = false;
config.crcBits = width;
config.crcResult = kCrcFinalChecksum;
break;
}
}
CRC_Init(CRC0, &config);
}
void hal_crc_compute_partial(const uint8_t *data, const size_t size)
{
CRC_WriteData(CRC0, data, size);
}
uint32_t hal_crc_get_result(void)
{
switch (width)
{
case kCrcBits16:
return CRC_Get16bitResult(CRC0);
case kCrcBits32:
return CRC_Get32bitResult(CRC0);
default:
MBED_ASSERT("Unhandled switch case");
return 0;
}
}
#endif // DEVICE_CRC

2
targets/targets.json
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@ -631,7 +631,7 @@
"macros": ["CPU_MK64FN1M0VMD12", "FSL_RTOS_MBED"],
"inherits": ["Target"],
"detect_code": ["0240"],
"device_has": ["ANALOGIN", "ANALOGOUT", "EMAC", "I2C", "I2CSLAVE", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SERIAL_ASYNCH", "SLEEP", "SPI", "SPI_ASYNCH", "SPISLAVE", "STDIO_MESSAGES", "STORAGE", "TRNG", "FLASH"],
"device_has": ["ANALOGIN", "ANALOGOUT", "CRC", "EMAC", "I2C", "I2CSLAVE", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SERIAL_ASYNCH", "SLEEP", "SPI", "SPI_ASYNCH", "SPISLAVE", "STDIO_MESSAGES", "STORAGE", "TRNG", "FLASH"],
"features": ["LWIP", "STORAGE"],
"release_versions": ["2", "5"],
"device_name": "MK64FN1M0xxx12",