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SmartAudio Lite compatibility: Send 0x00 bit even with Soft Serial.

This commit is contained in:
AJ Christensen 2019-02-01 23:06:46 +13:00
parent 966971c750
commit ca2c9ecf84
1 changed files with 2 additions and 8 deletions
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10
src/main/io/vtx_smartaudio.c
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@ -450,14 +450,7 @@ static void saReceiveFrame(uint8_t c)
static void saSendFrame(uint8_t *buf, int len) static void saSendFrame(uint8_t *buf, int len)
{ {
if (!IS_RC_MODE_ACTIVE(BOXVTXCONTROLDISABLE)) { if (!IS_RC_MODE_ACTIVE(BOXVTXCONTROLDISABLE)) {
switch (smartAudioSerialPort->identifier) { serialWrite(smartAudioSerialPort, 0x00); // Ensure line is low regardless of hardware pull-down capabilities.
case SERIAL_PORT_SOFTSERIAL1:
case SERIAL_PORT_SOFTSERIAL2:
break;
default:
serialWrite(smartAudioSerialPort, 0x00); // Generate 1st start bit
break;
}
for (int i = 0 ; i < len ; i++) { for (int i = 0 ; i < len ; i++) {
serialWrite(smartAudioSerialPort, buf[i]); serialWrite(smartAudioSerialPort, buf[i]);
@ -468,6 +461,7 @@ static void saSendFrame(uint8_t *buf, int len)
sa_outstanding = SA_CMD_NONE; sa_outstanding = SA_CMD_NONE;
} }
serialWrite(smartAudioSerialPort, 0x00); // Pull the line low again after sending frame.
sa_lastTransmissionMs = millis(); sa_lastTransmissionMs = millis();
} }