STM32 a nastavení lock-bitu pres OpenOCD

[Jaroslav Buchta]

Mozna, no, ale kdyz pouziju tu funkci, nemusim to resit ;-)
Me prece jen napr. takovyto zapis prijde dost prehledny a elegantni, po 
prekladu a optimalizaci to neni ani nejak neefektivni.>

     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

     DMA_InitTypeDef DMA_InitStructure;

     DMA_StructInit(&DMA_InitStructure);
     /* USART1_Rx_DMA_Channel (triggered by USART1 Rx event) Config */
     DMA_DeInit(DMA1_Channel5);
     DMA_InitStructure.DMA_PeripheralBaseAddr = 
(uint32_t)&(USART1->DR);      //USART1 DR
     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)mstRcvBuf;
     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
     DMA_InitStructure.DMA_BufferSize = MSTRCVBUFLEN;
     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
     DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
     DMA_InitStructure.DMA_Priority = DMA_Priority_High;
     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
     DMA_Init(DMA1_Channel5, &DMA_InitStructure);


     DMA_StructInit(&DMA_InitStructure);
     /* USART1_Tx_DMA_Channel (triggered by USART1 Tx event) Config */
     DMA_DeInit(DMA1_Channel4);
     DMA_InitStructure.DMA_PeripheralBaseAddr = 
(uint32_t)&(USART1->DR);      //USART1 DR
     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)bufTxMaster;
     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
     DMA_InitStructure.DMA_BufferSize = 1;
     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
     DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
     DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
     DMA_Init(DMA1_Channel4, &DMA_InitStructure);


     NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 14;
     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
     NVIC_Init(&NVIC_InitStructure);

     DMA_ITConfig(DMA1_Channel5, DMA_IT_HT| DMA_IT_TC, ENABLE);

      /* Enable USART1 DMA RX request */
     USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
     /* Enable USART1 DMA TX request */
     USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);

     DMA_Cmd(DMA1_Channel5, ENABLE);




Dne 5. 11. 2014 19:53, Jan Waclawek napsal(a):
>> Treba inicializace DMA je podstatne jednodussi naplnenim cca 15 polozek
>> struktury dle nejakeho vzoroveho prikladu a pouzitim funkce ...Init, nez
>> hledanim jake registry jak nastavit a v jakem poradi...
> Zhodou okolnosti su to len 4 registre - zdojova adresa, cielova adresa,
> pocet prenasanych poloziek a riadiaci register (plus treba vynulovat
> status bity, t.j. spolu s tym je to 5) a v lubovolnom poradi, kym sa to
> DMA nepovoli (tj najjednoduchsie je zapisovat do kontrolneho nakoniec,
> inak je to jedno).
>
> S pozitim symbolov z stm32xxxx.h je to aj prehladne (akurat si treba
> dopisat definicie poloziek pre bitove polia, KTORE BY SOM AJ NA TOMTO
> MIESTE RAD POPROSIL OD PRITOMNYCH Z ST, ABY ICH DOPLNILI), napr.
> www.efton.sk/STM32/bt.c spolu s www.efton.sk/STM32/stm32f4xx.h.zip
>
> wek
>
>
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