Code shown in details. I am guessing something is wrong with clocks - this doesn't make sense though since tx is working just fine. I see signals just fine on the scope. Both tx and rx are high during no transmit. Clocks and initialization code shown below.
CLK_DeInit(); // set the CLK peripherals to reset value
CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1); // set the master clock to HSI 16M
CLK_SYSCLKConfig(CLK_SOURCE_HSI);
CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV4); // set the cpu & window watch dog clock to 16M/4
CLK_CCOConfig(CLK_OUTPUT_CPUDIV4); // we are outputting the fCPU/4 (4MHz/4 = 1MHz) - PC4 CLK_CCO
TIM6_DeInit(); // TIM1 Peripheral Configuration Clear
TIM6_InternalClockConfig(); // select timer 6 to run from internal clock
TIM6_TimeBaseInit(TIM6_PRESCALER_64, 250 ); // set the timer clk and up count
TIM6_ITConfig(TIM6_IT_UPDATE, ENABLE); // turn on the interrup
/* Initialize PC5 I/Os in Output Mode for testing timer */
GPIO_Init(GPIOC, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST); // turn on port 5 as fast push pull output
/* Enable TIM6 */
TIM6_Cmd(ENABLE);
TIM5_TimeBaseInit(TIM5_PRESCALER_1 , 400); // Rev 1.01 Toro change to 1Khz PWM for voltage regulator issues due to PEM PWM
TIM5_OC1Init(TIM5_OCMODE_PWM2, TIM5_OUTPUTSTATE_ENABLE, 0, TIM5_OCPOLARITY_LOW);
TIM5_Cmd(ENABLE); // turn on timer 5
TIM1_DeInit(); //TIM1 Peripheral Clear
TIM1_TimeBaseInit(8, TIM1_COUNTERMODE_UP, clutch_up_count, 0); //setup time base unit at 1kHz
TIM1_OC3Init(TIM1_OCMODE_PWM1, TIM1_OUTPUTSTATE_ENABLE, TIM1_OUTPUTNSTATE_DISABLE,
0, TIM1_OCPOLARITY_HIGH, TIM1_OCNPOLARITY_LOW, TIM1_OCIDLESTATE_SET,
TIM1_OCNIDLESTATE_RESET); //Inititilzie output channel 3 to use Timer 1 for Clutch_EN PWM
TIM1_CtrlPWMOutputs(ENABLE); // enable PWM outputs on timer 1
TIM1_Cmd(ENABLE);
uart init code below
UART1_DeInit();
// UART pins
GPIO_Init(GPIOD, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST); // TX pin, PD5
GPIO_Init(GPIOD, GPIO_PIN_6, GPIO_MODE_IN_PU_NO_IT); // RX pin, PD6 GPIO_MODE_IN_PU_NO_IT GPIO_MODE_IN_FL_IT
CLK_PeripheralClockConfig(CLK_PERIPHERAL_UART1, ENABLE); //Enable clock for UART
UART1->CR1 = 0;
UART1->CR2 = 0b00101100; // enable TX RX, enable RX interrupt
UART1->CR3 = 0;
UART1->BRR2 = 0x0B;
UART1->BRR1 = 0x08;
//Note: Writing of BRR2 must precede BRR1 because writing of BRR1 will update the baud counter.
UART1_ReceiverWakeUpCmd(ENABLE);
interrupt code
INTERRUPT_HANDLER(UART1_RX_IRQHandler, 18)
{
}
This is also called in init
enableInterrupts();
Thoughts?
