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Zdravim,<br>
u nejake starsi verze GCC jsem musel delat neco podobneho. Prekladac
si myslel, ze adresa je pamet a ne zarizeni. Provadel tedy
optimalizace, kde nemel. Pomohla novejsi verze GCC nebo pridani
volatile na zakladni prvky<br>
#define PERIPH_BASEÂ Â Â Â Â Â Â Â Â Â ((uint32_t volatile)0x40000000)
/*!< Peripheral base address in the alias region */<br>
<br>
Jirka<br>
<br>
<br>
<div class="moz-cite-prefix">Dne 03.11.2017 v 20:40 Jaroslav Buchta
napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:4e6ce0d6-c6d8-1535-97b1-878eb3bca691@hascomp.cz">
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<div class="moz-cite-prefix">Tak jeste jednou, ta funkce taky
nebyla OK, jedine, co pri optimalizaci asi pomuze spolehlive je
<br>
<b>volatile</b> uint32_t AH,AL,BH,BL,CH,CL;<br>
Je mozne, ze to jinak prehodi instrukce tak, ze neni dodrzeno
poradi zapisu do GPIO registru, i kdyz jsou volatile?<br>
<br>
<br>
Dne 03.11.2017 v 20:19 Jaroslav Buchta napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:1e9d2132-22c9-1fe6-67bd-1e03e8189325@hascomp.cz">
<div class="moz-cite-prefix">Jeste koukam, ze GPIO_PIN_x je
uint16_t ale tohle taky nepomuze:<br>
<br>
#define PREPAREDOREGS(A,B,C,v)Â Â Â A =Â ((v)&0x01) ?
(uint32_t)TFT_D0_Pin : ((uint32_t)TFT_D0_Pin) << 16;\<br>
                        C = ((v)&0x02) ?
(uint32_t)TFT_D1_Pin : ((uint32_t)TFT_D1_Pin) << 16;\<br>
                        A |= ((v)&0x04) ?
(uint32_t)TFT_D2_Pin : ((uint32_t)TFT_D2_Pin) << 16;\<br>
                        B = ((v)&0x08) ?
(uint32_t)TFT_D3_Pin : ((uint32_t)TFT_D3_Pin) << 16;\<br>
                        B |= ((v)&0x10) ?
(uint32_t)TFT_D4_Pin : ((uint32_t)TFT_D4_Pin) << 16;\<br>
                        B |= ((v)&0x20) ?
(uint32_t)TFT_D5_Pin : ((uint32_t)TFT_D5_Pin) << 16;\<br>
                        B |= ((v)&0x40) ?
(uint32_t)TFT_D6_Pin : ((uint32_t)TFT_D6_Pin) << 16;\<br>
                        A |= ((v)&0x80) ?
(uint32_t)TFT_D7_Pin : ((uint32_t)TFT_D7_Pin) << 16<br>
<br>
Dne 03.11.2017 v 20:08 Jaroslav Buchta napsal(a):<br>
</div>
<blockquote type="cite"
cite="mid:aae1d506-23d6-e317-5c98-915f2b69bd43@hascomp.cz">Mam
kod pro plneni displeje pripojeneho osmibitove k STM32F303,
bity jsou namixovany na ruzne porty tak to neni uplne
jednoduche. Po zapnuti optimalizace mi to zacne asi vynechavat
nastaveni nekterych bitu, barvy jsou spatne, nefunguje to se
zakomentovanym makrem APPLYDOREGS, tak jak to je to unguje OK.
Pomuze take vypnout optimalizaci nebo AH,AL... definovat jako
volatile. <br>
<br>
assembler je pri optimalizaci strasnej gulas, na prvni pohled
se lisi kody pouzitim str vs str.w - jaky je v tom rozdil? Mel
jsem za to, ze jen v delce kodu instrukce, kdyz jsou operace s
registry... napr.: <br>
<br>
08001720:  str    r5, [r3, #24] <br>
08001722:  str    r1, [r4, #24] <br>
08001724:  str.w  r6, [r8, #24] <br>
<br>
Tusi nekdo cim to je? GPIOx->BSRR je snad definovano jako
volatile uint32_t. Reseni mam ale znervoznuje me to... <br>
<br>
#pragma GCC push_options <br>
#pragma GCC optimize ("O3") <br>
<br>
<br>
#define PREPAREDOREGS(A,B,C,v)Â Â Â A =Â ((v)&0x01) ?
TFT_D0_Pin : TFT_D0_Pin << 16;\ <br>
                        C = ((v)&0x02) ?
TFT_D1_Pin : TFT_D1_Pin << 16;\ <br>
                        A |= ((v)&0x04) ?
TFT_D2_Pin : TFT_D2_Pin << 16;\ <br>
                        B = ((v)&0x08) ?
TFT_D3_Pin : TFT_D3_Pin << 16;\ <br>
                        B |= ((v)&0x10) ?
TFT_D4_Pin : TFT_D4_Pin << 16;\ <br>
                        B |= ((v)&0x20) ?
TFT_D5_Pin : TFT_D5_Pin << 16;\ <br>
                        B |= ((v)&0x40) ?
TFT_D6_Pin : TFT_D6_Pin << 16;\ <br>
                        A |= ((v)&0x80) ?
TFT_D7_Pin : TFT_D7_Pin << 16 <br>
<br>
#define APPLYDOREGS(A,B,C)Â Â Â *(uint32_t
*)(&GPIOA->BSRR) = A;\ <br>
                     *(uint32_t *)(&GPIOB->BSRR)
= B;\ <br>
                     *(uint32_t *)(&GPIOC->BSRR)
= C <br>
<br>
//#define APPLYDOREGS(A,B,C)Â Â Â GPIOA->BSRR = A;\ <br>
//Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â GPIOB->BSRR = B;\ <br>
//Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â GPIOC->BSRR = C <br>
<br>
static void TftFillData (uint16_t w, int len) <br>
{ <br>
   uint32_t AH,AL,BH,BL,CH,CL; <br>
<br>
   TFT_RS_TPYA_GPIO_Port->BRR = TFT_RS_TPYA_Pin; <br>
   TFT_NCS_GPIO_Port->BRR = TFT_NCS_Pin; <br>
   PREPAREDOREGS(AH, BH, CH, 0x2c); <br>
   APPLYDOREGS(AH, BH, CH); <br>
   TFT_NWR_TPXA_GPIO_Port->BRR = TFT_NWR_TPXA_Pin; <br>
   __DSB(); <br>
   __ISB(); <br>
   TFT_NWR_TPXA_GPIO_Port->BSRR = TFT_NWR_TPXA_Pin; <br>
<br>
   TFT_RS_TPYA_GPIO_Port->BSRR = TFT_RS_TPYA_Pin; <br>
   PREPAREDOREGS(AH, BH, CH, (uint8_t)(w >> 8)); <br>
   PREPAREDOREGS(AL, BL, CL, (uint8_t)(w & 0xff)); <br>
   while (len--) <br>
   { <br>
      APPLYDOREGS(AH, BH, CH); <br>
      TFT_NWR_TPXA_GPIO_Port->BRR = TFT_NWR_TPXA_Pin; <br>
      __DSB(); <br>
      __ISB(); <br>
      TFT_NWR_TPXA_GPIO_Port->BSRR = TFT_NWR_TPXA_Pin; <br>
<br>
      APPLYDOREGS(AL, BL, CL); <br>
      TFT_NWR_TPXA_GPIO_Port->BRR = TFT_NWR_TPXA_Pin; <br>
      __DSB(); <br>
      __ISB(); <br>
      TFT_NWR_TPXA_GPIO_Port->BSRR = TFT_NWR_TPXA_Pin; <br>
   } <br>
   TFT_NCS_GPIO_Port->BSRR = TFT_NCS_Pin; <br>
} <br>
<br>
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