finally fixed bug in i2c address scan check routine
was checking if set instead of negated. oops.
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d32442da9a
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3eb211fb54
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@ -80,11 +80,9 @@ int8_t i2c_read_addr1b(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len)
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*data++ = I2C_ReceiveData(I2C1);
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*data++ = I2C_ReceiveData(I2C1);
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len--;
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len--;
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}
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if (!len) {
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I2C_GenerateSTOP(I2C1, ENABLE);
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I2C_GenerateSTOP(I2C1, ENABLE);
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}
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}
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return 0;
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return 0;
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}
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}
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@ -145,7 +143,7 @@ void i2c_write_reg_8b(uint8_t addr, uint8_t reg, const uint8_t dat)
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i2c_write_addr1b(addr, reg, &dat, 1);
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i2c_write_addr1b(addr, reg, &dat, 1);
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}
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}
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uint8_t i2c_addr_scan(uint8_t addr)
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int8_t i2c_addr_scan(uint8_t addr)
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{
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{
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uint8_t found = 1;
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uint8_t found = 1;
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uint32_t event;
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uint32_t event;
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@ -164,30 +162,28 @@ uint8_t i2c_addr_scan(uint8_t addr)
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT) && timeout--);
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if (!timeout) return -2;
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if (!timeout) return -2;
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I2C_Send7bitAddress(I2C1, addr, (addr & 1));
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I2C_Send7bitAddress(I2C1, (addr & 0xfe), (addr & 0x01));
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timeout = I2C_TIMEOUT_ACK_POLL;
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timeout = I2C_TIMEOUT_ACK_POLL;
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if (addr & 1) event = I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED;
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if (addr & 1) event = I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED;
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else event = I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED;
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else event = I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED;
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while (I2C_CheckEvent(I2C1, event) && timeout--) {
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while ((I2C_CheckEvent(I2C1, event) == NoREADY) && timeout--) {
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if (I2C_GetFlagStatus(I2C1, I2C_FLAG_AF)) {
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if (I2C_GetFlagStatus(I2C1, I2C_FLAG_AF)) {
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found = 0;
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found = 0;
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break;
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break;
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}
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}
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}
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}
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if (!timeout) {
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if (!timeout) {
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found = 0;
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found = 0;
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}
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}
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// reset flags; it might be in a fucked state
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I2C1->STAR1 = 0;
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// send a stop to make sure anything listening knows to stfu
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// send a stop to make sure anything listening knows to stfu
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I2C_GenerateSTOP(I2C1, ENABLE);
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I2C_GenerateSTOP(I2C1, ENABLE);
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// reset flags; it might be in a fucked state
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if (!found) {
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if (!found) {
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I2C1->STAR1 = 0;
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return 0;
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return 0;
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}
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}
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@ -19,7 +19,7 @@ int8_t i2c_write_addr1b(uint8_t addr, uint8_t reg, const uint8_t *data, uint8_t
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uint8_t i2c_read_reg_8b(uint8_t addr, uint8_t reg);
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uint8_t i2c_read_reg_8b(uint8_t addr, uint8_t reg);
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void i2c_write_reg_8b(uint8_t addr, uint8_t reg, const uint8_t dat);
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void i2c_write_reg_8b(uint8_t addr, uint8_t reg, const uint8_t dat);
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uint8_t i2c_addr_scan(uint8_t addr);
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int8_t i2c_addr_scan(uint8_t addr);
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