Hi,
Our camera sensor is 640x480 30Hz only. Below is my configuration so far, but no image on monitor. I think I need to configure pixel repetition in register 0x3B; I've tried a few different setting, but no luck. With the code in it's current state the 'main loop' section also shows pll locked and hpd detected.
void AppEntry( void )
{
uint32_t nCount = 0;
uint8_t nReg;
uint8_t nMode;
uint8_t nReg1, nReg2, nReg3;
//
// Power LED ON, status LED OFF
//
HAL_GPIO_WritePin( GPIOA, LED_PWR_Pin, GPIO_PIN_RESET );
HAL_GPIO_WritePin( GPIOA, LED_STATE_Pin, GPIO_PIN_SET );
//
// Check device is ready and we can talk to it
//
while( true )
{
HAL_StatusTypeDef hal_result;
hal_result = HAL_I2C_IsDeviceReady(
&hi2c1,
( uint16_t ) ( sg_nI2CAdds << 1 ) | 0x01,
3u,
200u
);
if ( hal_result == HAL_OK )
{
break;
}
HAL_Delay( 500 );
// Hard error after 5s.
nCount++;
if ( nCount == 10 )
{
Error_Halt( );
}
}
// === Power / reset ===
WriteReg(0x41, 0x10); // Power up
WriteReg(0x98, 0x03); // Required settings per ADI guide
WriteReg(0x9A, 0xE0);
WriteReg(0x9C, 0x30);
WriteReg(0x9D, 0x61); // Pixel clock divide = /1 (0x61 = ÷1, 27 MHz in)
WriteReg(0xA2, 0xA4);
WriteReg(0xA3, 0xA4);
WriteReg(0xE0, 0xD0);
WriteReg(0xF9, 0x00);
// === Input format ===
WriteReg(0x15, 0x04); // YCbCr 4:2:2, embedded sync
WriteReg(0x16, 0xB8); // 8-bit, style 1 (BT.656), input edge = rising
WriteReg(0x17, 0x02); // 4:3 aspect, DE generator enabled
WriteReg(0x48, 0x00); // Justification evenly distributed
WriteReg(0xD0, 0x00); // Sync pulse mode = case 2 (embedded)
// === Output format ===
WriteReg(0xAF, 0x04); // HDMI mode, no encryption
WriteReg(0x18, 0x06); // CSC disabled (bypass)
// === PLL reset sequence ===
//WriteReg(0x3B, 0x00); // Manual mode, PR = 1x
// === TMDS output ===
WriteReg(0xD6, 0xC0); // TMDS enabled, soft turn-on
//
// Main Loop
//
while( true )
{
//
// Status check
//
nReg1 = ReadReg( 0x41 );
nReg2 = ReadReg( 0x42 );
nReg3 = ReadReg( 0x9E );
if (( nReg1 & 0x10 ) && // Power EN
(( nReg2 & 0xF0 ) == 0xF0 ) && // HDMI status
( nReg3 & 0x10 )) // PLL Lock
{
// LED on
HAL_GPIO_WritePin( GPIOA, LED_STATE_Pin, GPIO_PIN_RESET );
}
else
{
// LED off
HAL_GPIO_WritePin( GPIOA, LED_STATE_Pin, GPIO_PIN_SET );
}
//
// Debug (use breakpoint)
//
// Detected input formats
nReg = ReadReg( 0x3E );
nReg = ReadReg( 0x3F );
nReg = ReadReg( 0x3B );
nReg = ReadReg( 0x3C );
}
}
