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42 lines
1.1 KiB
42 lines
1.1 KiB
void dac_init(DAC_TypeDef *dac, uint8_t channel, bool dma) {
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register_set(&dac->CR, 0U, 0xFFFFU);
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register_set(&dac->MCR, 0U, 0xFFFFU);
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switch(channel) {
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case 1:
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if (dma) {
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register_set_bits(&dac->CR, DAC_CR_DMAEN1);
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// register_set(&DAC->CR, (6U << DAC_CR_TSEL1_Pos), DAC_CR_TSEL1);
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register_set_bits(&dac->CR, DAC_CR_TEN1);
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} else {
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register_clear_bits(&dac->CR, DAC_CR_DMAEN1);
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}
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register_set_bits(&dac->CR, DAC_CR_EN1);
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break;
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case 2:
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if (dma) {
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register_set_bits(&dac->CR, DAC_CR_DMAEN2);
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} else {
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register_clear_bits(&dac->CR, DAC_CR_DMAEN2);
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}
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register_set_bits(&dac->CR, DAC_CR_EN2);
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break;
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default:
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break;
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}
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}
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// Set channel 1 value, in mV
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void dac_set(DAC_TypeDef *dac, uint8_t channel, uint32_t value) {
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uint32_t raw_val = MAX(MIN(value * (1UL << 8U) / 3300U, (1UL << 8U)), 0U);
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switch(channel) {
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case 1:
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register_set(&dac->DHR8R1, raw_val, 0xFFU);
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break;
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case 2:
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register_set(&dac->DHR8R2, raw_val, 0xFFU);
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break;
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default:
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break;
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}
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}
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