Merge pull request #273 from KarlK90/gd32vf103-i2c-fix
[GD32] Fix I2C Hangups
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9dbe061083
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@ -263,11 +263,8 @@ static void i2c_lld_serve_event_interrupt(I2CDriver *i2cp) {
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case I2C_EV6_MASTER_REC_MODE_SELECTED:
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dp->CTL1 &= ~I2C_CTL1_EVIE;
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/* Clear address flags before dma enable */
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if (event & (I2C_STAT0_ADDSEND | I2C_STAT0_ADD10SEND)){
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(void)dp->STAT0;
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(void)dp->STAT1;
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}
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dp->CTL1 |= I2C_CTL1_DMAON;
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dmaStreamEnable(i2cp->dmarx);
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dp->CTL1 |= I2C_CTL1_DMALST; /* Needed in receiver mode. */
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if (dmaStreamGetTransactionSize(i2cp->dmarx) < 2)
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@ -276,11 +273,8 @@ static void i2c_lld_serve_event_interrupt(I2CDriver *i2cp) {
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case I2C_EV6_MASTER_TRA_MODE_SELECTED:
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dp->CTL1 &= ~I2C_CTL1_EVIE;
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/* Clear address flags before dma enable */
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if (event & (I2C_STAT0_ADDSEND | I2C_STAT0_ADD10SEND)){
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(void)dp->STAT0;
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(void)dp->STAT1;
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}
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dp->CTL1 |= I2C_CTL1_DMAON;
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dmaStreamEnable(i2cp->dmatx);
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break;
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case I2C_EV8_2_MASTER_BYTE_TRANSMITTED:
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@ -303,6 +297,11 @@ static void i2c_lld_serve_event_interrupt(I2CDriver *i2cp) {
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(void)dp->STAT0;
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(void)dp->STAT1;
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}
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/* Errata 2.4.6 for STM32F40x, Spurious Bus Error detection in Master mode.*/
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if (event & I2C_STAT0_BERR) {
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dp->STAT0 &= ~I2C_STAT0_BERR;
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}
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}
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/**
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@ -582,9 +581,7 @@ void i2c_lld_start(I2CDriver *i2cp) {
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/* Reset i2c peripheral.*/
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dp->CTL0 = I2C_CTL0_SRESET;
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dp->CTL0 = 0;
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dp->CTL1 = 0;
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dp->STAT0 = 0;
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dp->CTL1 = I2C_CTL1_ERRIE;
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dp->CTL1 = I2C_CTL1_ERRIE | I2C_CTL1_DMAON;
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/* Setup I2C parameters.*/
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i2c_lld_set_clock(i2cp);
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i2c_lld_set_opmode(i2cp);
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