Dual Quadrature encoders

[pisaacs9]

Posted on January 31, 2013 at 08:04

I am trying to read a paid of quadrature encoders, I have managed to get one to read using code copied from this forum but I have been un able to read the second one, I have tried it on different timers (1,3,4) and on different pins but it just doesnt read, can anyone tell me what im doing wrong?

Any help would be greatly appreciated.  // Encoder 1    /* Enable GPIO clock */  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE);  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8,ENABLE);     // PC.6,PC.7 for encoder  GPIO_InitTypeDef GPIO_InitStructurePan;  GPIO_InitStructurePan.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;  GPIO_InitStructurePan.GPIO_PuPd = GPIO_PuPd_UP;  GPIO_InitStructurePan.GPIO_Mode = GPIO_Mode_AF;  GPIO_Init(GPIOC,&GPIO_InitStructurePan);     GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_TIM8);  GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_TIM8);     TIM_TimeBaseInitTypeDef TIM_TimeBaseStructurePan;  TIM_TimeBaseStructInit(&TIM_TimeBaseStructurePan);        TIM_TimeBaseStructurePan.TIM_Period = 0xffff;  TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructurePan);  TIM_EncoderInterfaceConfig(TIM8, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);     TIM8->CNT = 0;  TIM_Cmd(TIM8, ENABLE);   // Tilt Encoder     /* Enable GPIO clock */  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);  RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);     // PB.6,PB.7 for encoder  GPIO_InitTypeDef GPIO_InitStructureTilt;  GPIO_InitStructureTilt.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;  GPIO_InitStructureTilt.GPIO_PuPd = GPIO_PuPd_UP;  GPIO_InitStructureTilt.GPIO_Mode = GPIO_Mode_AF;  GPIO_Init(GPIOB,&GPIO_InitStructureTilt);     GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_TIM4);  GPIO_PinAFConfig(GPIOB, GPIO_PinSource5, GPIO_AF_TIM4);     TIM_TimeBaseInitTypeDef TIM_TimeBaseStructureTilt;  TIM_TimeBaseStructInit(&TIM_TimeBaseStructureTilt);        TIM_TimeBaseStructureTilt.TIM_Period = 0xffff;  TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructureTilt);  TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);     TIM4->CNT = 0;  TIM_Cmd(TIM4, ENABLE);

[Tesla DeLorean]

Posted on January 31, 2013 at 09:35

This should be the APB1 routine

   RCC_APB2PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE); You just enabled pins 6 and 7, now 4 and 5?   GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_TIM4);   GPIO_PinAFConfig(GPIOB, GPIO_PinSource5, GPIO_AF_TIM4);