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LPC176x: Expand HW SPI class

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This commit is contained in:
teemuatlut
2018-04-06 23:24:18 +03:00
parent 3b5dec4b13
commit f38c81cdde
4 changed files with 25 additions and 7 deletions
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17
Marlin/src/HAL/HAL_LPC1768/HAL_spi.cpp
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@@ -150,7 +150,7 @@
}
void spiInit(uint8_t spiRate) {
SSP_Cmd(LPC_SSP0, DISABLE); // Disable SSP0 before changing rate
// table to convert Marlin spiRates (0-5 plus default) into bit rates
uint32_t Marlin_speed[7]; // CPSR is always 2
Marlin_speed[0] = 8333333; //(SCR: 2) desired: 8,000,000 actual: 8,333,333 +4.2% SPI_FULL_SPEED
@@ -242,6 +242,21 @@
void SPIClass::begin() { spiBegin(); }
void SPIClass::beginTransaction(SPISettings cfg) {
uint8_t spiRate;
switch(cfg.spiRate()) {
case 8000000: spiRate=0 ;break;
case 4000000: spiRate=1 ;break;
case 2000000: spiRate=2 ;break;
case 1000000: spiRate=3 ;break;
case 500000: spiRate=4 ;break;
case 250000: spiRate=5 ;break;
case 125000: spiRate=6 ;break;
default: spiRate=2; break;
}
spiInit(spiRate);
}
uint8_t SPIClass::transfer(uint8_t B) {
return spiTransfer(B);
}