STM32 a nastavení lock-bitu pres OpenOCD

[Jaroslav Buchta]

Asi nejaka starsi verze LCD s malym rozlisenim ;-) sry, nedalo mi to ;-)
A proc by to melo byt ujete? Pripada mi to prehledne, delsi zapis IMHO 
nijak nevadi. Je to navic inicializace 2 DMA kanalu + jednoho preruseni, 
jak jsem to namatkou vykopiroval ze zdrojaku.


Dne 5. 11. 2014 20:36, Andrej Jancura napsal(a):
> 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 
> <mailto: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 <http://www.efton.sk/STM32/bt.c> spolu
>         s www.efton.sk/STM32/stm32f4xx.h.zip
>         <http://www.efton.sk/STM32/stm32f4xx.h.zip>
>
>         wek
>
>
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