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Merge pull request #315 from hanya/rpi2cirq 

[RP2040] i2c: Reduce intterupt frequency
This commit is contained in:
Fabien Poussin 2022-02-16 17:01:17 +01:00 committed by GitHub
parent 52c619778f a1850c6a33
commit ff1c6ec90c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 6 additions and 4 deletions
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10
os/hal/ports/RP/LLD/I2Cv1/hal_i2c_lld.c
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@ -118,10 +118,12 @@ static void serve_interrupt(I2CDriver *i2cp) {
/* Transmission phase. */
if (dp->INTRSTAT & I2C_IC_INTR_STAT_R_TX_EMPTY_Msk) {
if (i2cp->txbytes) {
dp->DATACMD = (uint32_t)i2cp->txbuf[i2cp->txindex] |
(i2cp->txbytes == 1 ? I2C_IC_DATA_CMD_STOP : 0);
i2cp->txindex++;
i2cp->txbytes--;
while (i2cp->txbytes && (dp->TXFLR & I2C_IC_TXFLR_TXFLR_Msk) < 16) {
dp->DATACMD = (uint32_t)i2cp->txbuf[i2cp->txindex] |
(i2cp->txbytes == 1 ? I2C_IC_DATA_CMD_STOP : 0);
i2cp->txindex++;
i2cp->txbytes--;
}
if (i2cp->txbytes == 0U) {
// Disable TX_EMPTY irq