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Run SPI FLASH at full speed

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This commit is contained in:
Steve Evans 2020-08-25 08:34:15 +01:00
parent 60c008b20b
commit 41a0ca43d1
39 changed files with 276 additions and 193 deletions
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11
src/main/drivers/flash.c
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@ -38,6 +38,11 @@
#include "drivers/io.h"
#include "drivers/time.h"
// 20 MHz max SPI frequency
#define FLASH_MAX_SPI_CLK_HZ 20000000
// 5 MHz max SPI init frequency
#define FLASH_MAX_SPI_INIT_CLK 5000000
static busDevice_t busInstance;
static busDevice_t *busdev;
@ -123,12 +128,10 @@ static bool flashSpiInit(const flashConfig_t *flashConfig)
IOHi(busdev->busdev_u.spi.csnPin);
#ifdef USE_SPI_TRANSACTION
spiBusTransactionInit(busdev, SPI_MODE3_POL_HIGH_EDGE_2ND, SPI_CLOCK_FAST);
spiBusTransactionInit(busdev, SPI_MODE3_POL_HIGH_EDGE_2ND, spiCalculateDivider(FLASH_MAX_SPI_INIT_CLK));
#else
#ifndef FLASH_SPI_SHARED
//Maximum speed for standard READ command is 20mHz, other commands tolerate 25mHz
//spiSetDivisor(busdev->busdev_u.spi.instance, SPI_CLOCK_FAST);
spiSetDivisor(busdev->busdev_u.spi.instance, SPI_CLOCK_STANDARD*2);
spiSetDivisor(busdev->busdev_u.spi.instance, spiCalculateDivider(FLASH_MAX_SPI_INIT_CLK));
#endif
#endif