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rt-thread-official/bsp/gd32/arm/libraries/gd32_drivers/drv_sdram.c

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-12-04 zylx first version
* 2023-08-20 yuanzihao adapter gd32f4xx
*/
#include <board.h>
#ifdef BSP_USING_SDRAM
#include <sdram_port.h>
#define DRV_DEBUG
#define LOG_TAG "drv.sdram"
#include <drv_log.h>
static exmc_sdram_parameter_struct sdram_init_struct;
static exmc_sdram_command_parameter_struct sdram_command_init_struct;
static exmc_sdram_timing_parameter_struct sdram_timing_init_struct;
#ifdef RT_USING_MEMHEAP_AS_HEAP
static struct rt_memheap system_heap;
#endif
static void SDRAM_Initialization_GPIO(void)
{
/* enable EXMC clock*/
rcu_periph_clock_enable(RCU_EXMC);
rcu_periph_clock_enable(RCU_GPIOB);
rcu_periph_clock_enable(RCU_GPIOC);
rcu_periph_clock_enable(RCU_GPIOD);
rcu_periph_clock_enable(RCU_GPIOE);
rcu_periph_clock_enable(RCU_GPIOF);
rcu_periph_clock_enable(RCU_GPIOG);
rcu_periph_clock_enable(RCU_GPIOH);
/* common GPIO configuration */
/* SDNWE(PC0),SDNE0(PC2),SDCKE0(PC3) pin configuration */
gpio_af_set(GPIOC, GPIO_AF_12, GPIO_PIN_0 | GPIO_PIN_2 | GPIO_PIN_3);
gpio_mode_set(GPIOC, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_0 | GPIO_PIN_2 | GPIO_PIN_3);
gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_2 | GPIO_PIN_3);
/* D2(PD0),D3(PD1),D13(PD8),D14(PD9),D15(PD10),D0(PD14),D1(PD15) pin configuration */
gpio_af_set(GPIOD, GPIO_AF_12, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_8 | GPIO_PIN_9 |
GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_mode_set(GPIOD, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_8 | GPIO_PIN_9 |
GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_output_options_set(GPIOD, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_8 | GPIO_PIN_9 |
GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15);
/* NBL0(PE0),NBL1(PE1),D4(PE7),D5(PE8),D6(PE9),D7(PE10),D8(PE11),D9(PE12),D10(PE13),D11(PE14),D12(PE15) pin configuration */
gpio_af_set(GPIOE, GPIO_AF_12, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_7 | GPIO_PIN_8 |
GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_mode_set(GPIOE, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_7 | GPIO_PIN_8 |
GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_output_options_set(GPIOE, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_7 | GPIO_PIN_8 |
GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
/* A0(PF0),A1(PF1),A2(PF2),A3(PF3),A4(PF4),A5(PF5),NRAS(PF11),A6(PF12),A7(PF13),A8(PF14),A9(PF15) pin configuration */
gpio_af_set(GPIOF, GPIO_AF_12, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 |
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_mode_set(GPIOF, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 |
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
gpio_output_options_set(GPIOF, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 |
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_11 | GPIO_PIN_12 |
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15);
/* A10(PG0),A11(PG1),A12(PG2),A14(PG4),A15(PG5),SDCLK(PG8),NCAS(PG15) pin configuration */
gpio_af_set(GPIOG, GPIO_AF_12, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_4 |
GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_15);
gpio_mode_set(GPIOG, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_4 |
GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_15);
gpio_output_options_set(GPIOG, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_4 |
GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_15);
}
/**
* @brief Perform the SDRAM exernal memory inialization sequence
* @param hsdram: SDRAM handle
* @param Command: Pointer to SDRAM command structure
* @retval None
*/
static rt_err_t SDRAM_Initialization_Sequence(exmc_sdram_parameter_struct *hsdram, exmc_sdram_command_parameter_struct *Command)
{
__IO uint32_t tmpmrd = 0;
uint32_t target_bank = 0;
uint32_t sdram_device = EXMC_SDRAM_DEVICE0;
uint32_t command_content = 0;
uint32_t timeout = SDRAM_TIMEOUT;
#if SDRAM_TARGET_BANK == 1
target_bank = EXMC_SDRAM_DEVICE0_SELECT;
#else
target_bank = EXMC_SDRAM_DEVICE1_SELECT;
#endif
SDRAM_Initialization_GPIO();
/* EXMC SDRAM device initialization sequence --------------------------------*/
/* Step 1 : configure SDRAM timing registers --------------------------------*/
/* LMRD: 2 clock cycles */
sdram_timing_init_struct.load_mode_register_delay = LOADTOACTIVEDELAY;
/* XSRD: min = 75ns */
sdram_timing_init_struct.exit_selfrefresh_delay = EXITSELFREFRESHDELAY;
/* RASD: min=44ns , max=120k (ns) */
sdram_timing_init_struct.row_address_select_delay = ROWCYCLEDELAY;
/* ARFD: min=66ns */
sdram_timing_init_struct.auto_refresh_delay = SELFREFRESHTIME;
/* WRD: min=1 Clock cycles +7.5ns */
sdram_timing_init_struct.write_recovery_delay = WRITERECOVERYTIME;
/* RPD: min=20ns */
sdram_timing_init_struct.row_precharge_delay = RPDELAY;
/* RCD: min=20ns */
sdram_timing_init_struct.row_to_column_delay = RCDDELAY;
/* step 2 : configure SDRAM control registers ---------------------------------*/
sdram_init_struct.sdram_device = sdram_device;
sdram_init_struct.column_address_width = SDRAM_COLUMN_BITS;
sdram_init_struct.row_address_width = SDRAM_ROW_BITS;
sdram_init_struct.data_width = SDRAM_DATA_WIDTH;
sdram_init_struct.internal_bank_number = EXMC_SDRAM_4_INTER_BANK;
sdram_init_struct.cas_latency = SDRAM_CAS_LATENCY;
sdram_init_struct.write_protection = DISABLE;
sdram_init_struct.sdclock_config = SDCLOCK_PERIOD;
sdram_init_struct.burst_read_switch = ENABLE;
sdram_init_struct.pipeline_read_delay = SDRAM_RPIPE_DELAY;
sdram_init_struct.timing = &sdram_timing_init_struct;
/* EXMC SDRAM bank initialization */
exmc_sdram_init(&sdram_init_struct);
/* step 3 : configure CKE high command---------------------------------------*/
sdram_command_init_struct.command = EXMC_SDRAM_CLOCK_ENABLE;
sdram_command_init_struct.bank_select = target_bank;
sdram_command_init_struct.auto_refresh_number = EXMC_SDRAM_AUTO_REFLESH_2_SDCLK;
sdram_command_init_struct.mode_register_content = 0;
/* wait until the SDRAM controller is ready */
while((exmc_flag_get(sdram_device, EXMC_SDRAM_FLAG_NREADY) != RESET) && (timeout > 0)) {
timeout--;
}
if(0 == timeout) {
return RT_ERROR;
}
/* send the command */
exmc_sdram_command_config(&sdram_command_init_struct);
/* step 4 : insert 10ms delay----------------------------------------------*/
// rt_thread_mdelay(10);
/* step 5 : configure precharge all command----------------------------------*/
sdram_command_init_struct.command = EXMC_SDRAM_PRECHARGE_ALL;
sdram_command_init_struct.bank_select = target_bank;
sdram_command_init_struct.auto_refresh_number = EXMC_SDRAM_AUTO_REFLESH_2_SDCLK;
sdram_command_init_struct.mode_register_content = 0;
/* wait until the SDRAM controller is ready */
timeout = SDRAM_TIMEOUT;
while((exmc_flag_get(sdram_device, EXMC_SDRAM_FLAG_NREADY) != RESET) && (timeout > 0)) {
timeout--;
}
if(0 == timeout) {
return RT_ERROR;
}
/* send the command */
exmc_sdram_command_config(&sdram_command_init_struct);
/* step 6 : configure Auto-Refresh command-----------------------------------*/
sdram_command_init_struct.command = EXMC_SDRAM_AUTO_REFRESH;
sdram_command_init_struct.bank_select = target_bank;
sdram_command_init_struct.auto_refresh_number = EXMC_SDRAM_AUTO_REFLESH_9_SDCLK;
sdram_command_init_struct.mode_register_content = 0;
/* wait until the SDRAM controller is ready */
timeout = SDRAM_TIMEOUT;
while((exmc_flag_get(sdram_device, EXMC_SDRAM_FLAG_NREADY) != RESET) && (timeout > 0)) {
timeout--;
}
if(0 == timeout) {
return RT_ERROR;
}
/* send the command */
exmc_sdram_command_config(&sdram_command_init_struct);
/* step 7 : configure load mode register command-----------------------------*/
/* program mode register */
command_content = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1 |
SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL |
SDRAM_MODEREG_CAS_LATENCY_3 |
SDRAM_MODEREG_OPERATING_MODE_STANDARD |
SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;
sdram_command_init_struct.command = EXMC_SDRAM_LOAD_MODE_REGISTER;
sdram_command_init_struct.bank_select = target_bank;
sdram_command_init_struct.auto_refresh_number = EXMC_SDRAM_AUTO_REFLESH_2_SDCLK;
sdram_command_init_struct.mode_register_content = command_content;
/* wait until the SDRAM controller is ready */
timeout = SDRAM_TIMEOUT;
while((exmc_flag_get(sdram_device, EXMC_SDRAM_FLAG_NREADY) != RESET) && (timeout > 0)) {
timeout--;
}
if(0 == timeout) {
return RT_ERROR;
}
/* send the command */
exmc_sdram_command_config(&sdram_command_init_struct);
/* step 8 : set the auto-refresh rate counter--------------------------------*/
/* 64ms, 8192-cycle refresh, 64ms/8192=7.81us */
/* SDCLK_Freq = SYS_Freq/2 */
/* (7.81 us * SDCLK_Freq) - 20 */
exmc_sdram_refresh_count_set(761);
/* wait until the SDRAM controller is ready */
timeout = SDRAM_TIMEOUT;
while((exmc_flag_get(sdram_device, EXMC_SDRAM_FLAG_NREADY) != RESET) && (timeout > 0)) {
timeout--;
}
if(0 == timeout) {
return RT_ERROR;
}
return RT_EOK;
}
static int SDRAM_Init(void)
{
int result = RT_EOK;
/* Initialize the SDRAM controller */
if (SDRAM_Initialization_Sequence(&sdram_init_struct, &sdram_command_init_struct) != RT_EOK)
{
LOG_E("SDRAM init failed!");
result = -RT_ERROR;
}
else
{
rt_kprintf("sdram init success, mapped at 0x%X, size is %d bytes, data width is %d", SDRAM_BANK_ADDR, SDRAM_SIZE, SDRAM_DATA_WIDTH);
#ifdef RT_USING_MEMHEAP_AS_HEAP
/* If RT_USING_MEMHEAP_AS_HEAP is enabled, SDRAM is initialized to the heap */
rt_memheap_init(&system_heap, "sdram", (void *)SDRAM_BANK_ADDR, SDRAM_SIZE);
#endif
}
return result;
}
INIT_BOARD_EXPORT(SDRAM_Init);
#ifdef DRV_DEBUG
#ifdef FINSH_USING_MSH
int sdram_test(void)
{
int i = 0;
uint32_t start_time = 0, time_cast = 0;
#if SDRAM_DATA_WIDTH_IN_NUMBER == 8
char data_width = 1;
uint8_t data = 0;
#elif SDRAM_DATA_WIDTH_IN_NUMBER == 16
char data_width = 2;
uint16_t data = 0;
#else
char data_width = 4;
uint32_t data = 0;
#endif
/* write data */
LOG_D("Writing the %ld bytes data, waiting....", SDRAM_SIZE);
start_time = rt_tick_get();
for (i = 0; i < SDRAM_SIZE / data_width; i++)
{
#if SDRAM_DATA_WIDTH_IN_NUMBER == 8
*(__IO uint8_t *)(SDRAM_BANK_ADDR + i * data_width) = (uint8_t)0x55;
#elif SDRAM_DATA_WIDTH_IN_NUMBER == 16
*(__IO uint16_t *)(SDRAM_BANK_ADDR + i * data_width) = (uint16_t)0x5555;
#else
*(__IO uint32_t *)(SDRAM_BANK_ADDR + i * data_width) = (uint32_t)0x55555555;
#endif
}
time_cast = rt_tick_get() - start_time;
LOG_D("Write data success, total time: %d.%03dS.", time_cast / RT_TICK_PER_SECOND,
time_cast % RT_TICK_PER_SECOND / ((RT_TICK_PER_SECOND * 1 + 999) / 1000));
/* read data */
LOG_D("start Reading and verifying data, waiting....");
for (i = 0; i < SDRAM_SIZE / data_width; i++)
{
#if SDRAM_DATA_WIDTH_IN_NUMBER == 8
data = *(__IO uint8_t *)(SDRAM_BANK_ADDR + i * data_width);
if (data != 0x55)
{
LOG_E("SDRAM test failed!");
break;
}
#elif SDRAM_DATA_WIDTH_IN_NUMBER == 16
data = *(__IO uint16_t *)(SDRAM_BANK_ADDR + i * data_width);
if (data != 0x5555)
{
LOG_E("SDRAM test failed!");
break;
}
#else
data = *(__IO uint32_t *)(SDRAM_BANK_ADDR + i * data_width);
if (data != 0x55555555)
{
LOG_E("SDRAM test failed!");
break;
}
#endif
}
if (i >= SDRAM_SIZE / data_width)
{
LOG_D("SDRAM test success!");
}
return RT_EOK;
}
MSH_CMD_EXPORT(sdram_test, sdram test)
#endif /* FINSH_USING_MSH */
#endif /* DRV_DEBUG */
#endif /* BSP_USING_SDRAM */
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