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74 lines
1.4 KiB
74 lines
1.4 KiB
9 years ago
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#include "max2719.h"
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static inline
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void send_byte(MAX2719_Cfg *inst, uint8_t b)
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{
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inst->SPIx->DR = b;
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while (!(inst->SPIx->SR & SPI_SR_TXE));
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}
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static inline
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void set_nss(MAX2719_Cfg *inst, bool nss)
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{
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if (nss) {
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inst->CS_GPIOx->BSRR = inst->CS_PINx;
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} else {
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inst->CS_GPIOx->BRR = inst->CS_PINx;
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}
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}
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static void send_word(MAX2719_Cfg *inst, MAX2719_Command cmd, uint8_t data)
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{
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send_byte(inst, cmd);
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send_byte(inst, data);
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}
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void max2719_cmd(MAX2719_Cfg *inst, uint32_t nth, MAX2719_Command cmd, uint8_t data)
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{
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set_nss(inst, 0);
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while (inst->SPIx->SR & SPI_SR_BSY);
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for (uint32_t i = 0; i < inst->chain_len; i++) {
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if (i == inst->chain_len - nth - 1) {
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send_word(inst, cmd, data);
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} else {
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send_word(inst, MAX2719_CMD_NOOP, 0);
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}
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}
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while (inst->SPIx->SR & SPI_SR_BSY);
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set_nss(inst, 1);
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}
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void max2719_cmd_all(MAX2719_Cfg *inst, MAX2719_Command cmd, uint8_t data)
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{
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set_nss(inst, 0);
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while (inst->SPIx->SR & SPI_SR_BSY);
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for (uint32_t i = 0; i < inst->chain_len; i++) {
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send_word(inst, cmd, data);
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}
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while (inst->SPIx->SR & SPI_SR_BSY);
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set_nss(inst, 1);
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}
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void max2719_cmd_all_data(MAX2719_Cfg *inst, MAX2719_Command cmd, uint8_t *data)
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{
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set_nss(inst, 0);
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while (inst->SPIx->SR & SPI_SR_BSY);
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for (uint32_t i = 0; i < inst->chain_len; i++) {
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send_word(inst, cmd, data[inst->chain_len - i - 1]);
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}
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while (inst->SPIx->SR & SPI_SR_BSY);
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set_nss(inst, 1);
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}
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