Re: STM32 a nastavení lock-bitu pres OpenOCD

[Andrej Jancura]

No nech to je logicke ako chce, ja ten kod na svojom netbooku vidim na
troch obrazovkach... Nieco podobne ako doobeda prepinanie hodin.

Nezda sa Vam to trochu uletene?!

A.

2014-11-05 20:22 GMT+01:00 Jaroslav Buchta <jaroslav.buchta na hascomp.cz>:

> 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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>
>
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