94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
#include "parallel_nand_port_stm32f407ve.h"
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#include "stm32f4xx_hal.h"
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#include "stm32f4xx_hal_nand.h"
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#define PNAND_F407_BANK2_BASE 0x70000000UL
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#define PNAND_F407_CMD_AREA (1UL << 16)
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#define PNAND_F407_ADDR_AREA (1UL << 17)
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static NAND_HandleTypeDef hnand;
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static int f407_init(void)
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{
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GPIO_InitTypeDef io;
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FSMC_NAND_PCC_TimingTypeDef common;
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FSMC_NAND_PCC_TimingTypeDef attribute;
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__HAL_RCC_GPIOD_CLK_ENABLE();
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__HAL_RCC_GPIOE_CLK_ENABLE();
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__HAL_RCC_FSMC_CLK_ENABLE();
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io.Mode = GPIO_MODE_AF_PP;
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io.Pull = GPIO_NOPULL;
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io.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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io.Alternate = GPIO_AF12_FSMC;
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io.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4 | GPIO_PIN_5 |
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GPIO_PIN_6 | GPIO_PIN_7 | GPIO_PIN_11 | GPIO_PIN_12 |
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GPIO_PIN_14 | GPIO_PIN_15;
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HAL_GPIO_Init(GPIOD, &io);
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io.Pin = GPIO_PIN_7 | GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10;
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HAL_GPIO_Init(GPIOE, &io);
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hnand.Instance = FSMC_NAND_DEVICE;
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hnand.Init.NandBank = FSMC_NAND_BANK2;
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hnand.Init.Waitfeature = FSMC_NAND_PCC_WAIT_FEATURE_DISABLE;
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hnand.Init.MemoryDataWidth = FSMC_NAND_PCC_MEM_BUS_WIDTH_8;
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hnand.Init.EccComputation = FSMC_NAND_ECC_DISABLE;
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hnand.Init.ECCPageSize = FSMC_NAND_ECC_PAGE_SIZE_2048BYTE;
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hnand.Init.TCLRSetupTime = 2U;
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hnand.Init.TARSetupTime = 2U;
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common.SetupTime = 2U;
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common.WaitSetupTime = 5U;
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common.HoldSetupTime = 3U;
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common.HiZSetupTime = 2U;
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attribute = common;
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return HAL_NAND_Init(&hnand, &common, &attribute) == HAL_OK ? 0 : -1;
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}
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static void f407_select(void) { /* FSMC_NCE2 активируется доступом. */ }
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static void f407_deselect(void) { }
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static void f407_write_command(pnand_octet_t value)
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{
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*(__IO uint8_t *)(PNAND_F407_BANK2_BASE | PNAND_F407_CMD_AREA) =
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(uint8_t)value;
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}
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static void f407_write_address(pnand_octet_t value)
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{
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*(__IO uint8_t *)(PNAND_F407_BANK2_BASE | PNAND_F407_ADDR_AREA) =
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(uint8_t)value;
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}
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static void f407_write_data(pnand_octet_t value)
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{
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*(__IO uint8_t *)PNAND_F407_BANK2_BASE = (uint8_t)value;
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}
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static pnand_octet_t f407_read_data(void)
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{
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return *(__IO uint8_t *)PNAND_F407_BANK2_BASE;
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}
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static int f407_is_ready(void)
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{
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return HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_6) == GPIO_PIN_SET;
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}
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static void f407_set_wp(int enabled)
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{
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/* WP# аппаратный в базовой схеме. */
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(void)enabled;
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}
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static void f407_delay_us(unsigned long us)
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{
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uint32_t cycles = (SystemCoreClock / 3000000UL) * (uint32_t)us;
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while (cycles-- != 0U) __NOP();
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}
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static const parallel_nand_port_t f407_port = {
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f407_init, f407_select, f407_deselect,
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f407_write_command, f407_write_address, f407_write_data,
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f407_read_data, f407_is_ready, f407_set_wp, f407_delay_us
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};
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const parallel_nand_port_t *parallel_nand_port_stm32f407ve(void)
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{
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return &f407_port;
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}
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