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Code Issues Releases Wiki Activity

🎨 Prefer DELAY_NS over DELAY_CYCLES (#22382)

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Katelyn Schiesser 2021-07-17 23:10:13 -07:00 committed by GitHub
parent 49da4ee4e2
commit e55427aaa2
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1 changed files with 4 additions and 4 deletions
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8
Marlin/src/HAL/DUE/HAL_SPI.cpp
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@ -240,7 +240,7 @@
}
// all the others
static uint32_t spiDelayCyclesX4 = 4 * (F_CPU) / 1000000; // 4µs => 125khz
static uint16_t spiDelayNS = 4000; // 4000ns => 125khz
static uint8_t spiTransferX(uint8_t b) { // using Mode 0
int bits = 8;
@ -249,12 +249,12 @@
b <<= 1; // little setup time
WRITE(SD_SCK_PIN, HIGH);
DELAY_CYCLES(spiDelayCyclesX4);
DELAY_NS(spiDelayNS);
b |= (READ(SD_MISO_PIN) != 0);
WRITE(SD_SCK_PIN, LOW);
DELAY_CYCLES(spiDelayCyclesX4);
DELAY_NS(spiDelayNS);
} while (--bits);
return b;
}
@ -510,7 +510,7 @@
spiRxBlock = (pfnSpiRxBlock)spiRxBlockX;
break;
default:
spiDelayCyclesX4 = ((F_CPU) / 1000000) >> (6 - spiRate) << 2; // spiRate of 2 gives the maximum error with current CPU
spiDelayNS = 4000 >> (6 - spiRate); // spiRate of 2 gives the maximum error with current CPU
spiTransferTx = (pfnSpiTransfer)spiTransferX;
spiTransferRx = (pfnSpiTransfer)spiTransferX;
spiTxBlock = (pfnSpiTxBlock)spiTxBlockX;