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Flash/FPGA driver for configuration and firmware update from uC

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This commit is contained in:
Jan Käberich 2020-08-30 16:20:00 +02:00
parent 16f050a11e
commit 8c8749accd
20 changed files with 520 additions and 62 deletions
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100
Software/VNA_embedded/Application/Drivers/Flash.cpp Normal file
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#include "Flash.hpp"
bool Flash::isPresent() {
CS(false);
// read JEDEC ID
uint8_t send[4] = {0x9F};
uint8_t recv[4];
HAL_SPI_TransmitReceive(spi, send, recv, 4, 100);
CS(true);
if(recv[1] != 0xEF) {
// wrong manufacturer ID, communication with flash not working
return false;
}
return true;
}
void Flash::read(uint32_t address, uint16_t length, void *dest) {
initiateRead(address);
// read data
HAL_SPI_Receive(spi, (uint8_t*) dest, length, 1000);
CS(true);
}
bool Flash::write(uint32_t address, uint16_t length, uint8_t *src) {
if((address & 0xFF) != 0 || length%256 != 0) {
// only writes to complete pages allowed
return false;
}
address &= 0x00FFFFFF;
while(length > 0) {
EnableWrite();
CS(false);
uint8_t cmd[4] = {
0x02,
((uint8_t) address >> 16) & 0xFF,
((uint8_t) address >> 8) & 0xFF,
(uint8_t) (address & 0xFF),
};
// issue read command
HAL_SPI_Transmit(spi, cmd, 4, 100);
// write data
HAL_SPI_Transmit(spi, src, 256, 1000);
CS(true);
if(!WaitBusy(5)) {
return false;
}
length -= 256;
src += 256;
}
return true;
}
void Flash::EnableWrite() {
CS(false);
// enable write latch
uint8_t wel = 0x06;
HAL_SPI_Transmit(spi, &wel, 1, 100);
CS(true);
}
bool Flash::eraseChip() {
EnableWrite();
CS(false);
// enable write latch
uint8_t chip_erase = 0x60;
HAL_SPI_Transmit(spi, &chip_erase, 1, 100);
CS(true);
return WaitBusy(25000);
}
void Flash::initiateRead(uint32_t address) {
address &= 0x00FFFFFF;
CS(false);
uint8_t cmd[4] = {
0x03,
((uint8_t) address >> 16) & 0xFF,
((uint8_t) address >> 8) & 0xFF,
(uint8_t) (address & 0xFF),
};
// issue read command
HAL_SPI_Transmit(spi, cmd, 4, 100);
}
bool Flash::WaitBusy(uint32_t timeout) {
uint32_t starttime = HAL_GetTick();
CS(false);
uint8_t readStatus1 = 0x05;
HAL_SPI_Transmit(spi, &readStatus1, 1, 100);
while(HAL_GetTick() - starttime > timeout) {
uint8_t status1;
HAL_SPI_Receive(spi, &status1, 1, 100);
if(!(status1 & 0x01)) {
CS(true);
return true;
}
}
// timed out
CS(true);
return false;
}