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nodemcu-firmware/app/driver/spi.c

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#include "driver/spi.h"
/******************************************************************************
* FunctionName : spi_lcd_mode_init
* Description : SPI master initial function for driving LCD TM035PDZV36
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
*******************************************************************************/
void spi_lcd_mode_init(uint8 spi_no)
{
uint32 regvalue;
if(spi_no>1) return; //handle invalid input number
//bit9 of PERIPHS_IO_MUX should be cleared when HSPI clock doesn't equal CPU clock
//bit8 of PERIPHS_IO_MUX should be cleared when SPI clock doesn't equal CPU clock
if(spi_no==SPI){
WRITE_PERI_REG(PERIPHS_IO_MUX, 0x005); //clear bit9,and bit8
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CMD_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA0_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA1_U, 1);//configure io to spi mode
}else if(spi_no==HSPI){
WRITE_PERI_REG(PERIPHS_IO_MUX, 0x105); //clear bit9
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 2);//configure io to spi mode
}
SET_PERI_REG_MASK(SPI_USER(spi_no), SPI_CS_SETUP|SPI_CS_HOLD|SPI_USR_COMMAND);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_FLASH_MODE);
// SPI clock=CPU clock/8
WRITE_PERI_REG(SPI_CLOCK(spi_no),
((1&SPI_CLKDIV_PRE)<<SPI_CLKDIV_PRE_S)|
((3&SPI_CLKCNT_N)<<SPI_CLKCNT_N_S)|
((1&SPI_CLKCNT_H)<<SPI_CLKCNT_H_S)|
((3&SPI_CLKCNT_L)<<SPI_CLKCNT_L_S)); //clear bit 31,set SPI clock div
}
/******************************************************************************
* FunctionName : spi_lcd_9bit_write
* Description : SPI 9bits transmission function for driving LCD TM035PDZV36
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
* uint8 high_bit - first high bit of the data, 0 is for "0",the other value 1-255 is for "1"
* uint8 low_8bit- the rest 8bits of the data.
*******************************************************************************/
void spi_lcd_9bit_write(uint8 spi_no,uint8 high_bit,uint8 low_8bit)
{
uint32 regvalue;
uint8 bytetemp;
if(spi_no>1) return; //handle invalid input number
if(high_bit) bytetemp=(low_8bit>>1)|0x80;
else bytetemp=(low_8bit>>1)&0x7f;
regvalue= ((8&SPI_USR_COMMAND_BITLEN)<<SPI_USR_COMMAND_BITLEN_S)|((uint32)bytetemp); //configure transmission variable,9bit transmission length and first 8 command bit
if(low_8bit&0x01) regvalue|=BIT15; //write the 9th bit
while(READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR); //waiting for spi module available
WRITE_PERI_REG(SPI_USER2(spi_no), regvalue); //write command and command length into spi reg
SET_PERI_REG_MASK(SPI_CMD(spi_no), SPI_USR); //transmission start
}
/******************************************************************************
* FunctionName : spi_master_init
* Description : SPI master initial function for common byte units transmission
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
*******************************************************************************/
void spi_master_init(uint8 spi_no)
{
uint32 regvalue;
if(spi_no>1) return; //handle invalid input number
if(spi_no==SPI){
WRITE_PERI_REG(PERIPHS_IO_MUX, 0x005);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CMD_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA0_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA1_U, 1);//configure io to spi mode
}
else if(spi_no==HSPI){
WRITE_PERI_REG(PERIPHS_IO_MUX, 0x105);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 2);//configure io to spi mode
}
SET_PERI_REG_MASK(SPI_USER(spi_no), SPI_CS_SETUP|SPI_CS_HOLD|SPI_USR_COMMAND|SPI_USR_MOSI);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_FLASH_MODE);
//clear Daul or Quad lines transmission mode
CLEAR_PERI_REG_MASK(SPI_CTRL(spi_no), SPI_QIO_MODE|SPI_DIO_MODE|SPI_DOUT_MODE|SPI_QOUT_MODE);
WRITE_PERI_REG(SPI_CLOCK(spi_no),
((3&SPI_CLKCNT_N)<<SPI_CLKCNT_N_S)|
((1&SPI_CLKCNT_H)<<SPI_CLKCNT_H_S)|
((3&SPI_CLKCNT_L)<<SPI_CLKCNT_L_S)); //clear bit 31,set SPI clock div
//set 8bit output buffer length, the buffer is the low 8bit of register"SPI_FLASH_C0"
WRITE_PERI_REG(SPI_USER1(spi_no),
((7&SPI_USR_MOSI_BITLEN)<<SPI_USR_MOSI_BITLEN_S)|
((7&SPI_USR_MISO_BITLEN)<<SPI_USR_MISO_BITLEN_S));
}
/******************************************************************************
* FunctionName : spi_mast_byte_write
* Description : SPI master 1 byte transmission function
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
* uint8 data- transmitted data
*******************************************************************************/
void spi_mast_byte_write(uint8 spi_no,uint8 data)
{
uint32 regvalue;
if(spi_no>1) return; //handle invalid input number
while(READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_USR_MOSI|SPI_USR_MISO);
//SPI_FLASH_USER2 bit28-31 is cmd length,cmd bit length is value(0-15)+1,
// bit15-0 is cmd value.
WRITE_PERI_REG(SPI_USER2(spi_no),
((7&SPI_USR_COMMAND_BITLEN)<<SPI_USR_COMMAND_BITLEN_S)|((uint32)data));
SET_PERI_REG_MASK(SPI_CMD(spi_no), SPI_USR);
}
/******************************************************************************
* FunctionName : spi_byte_write_espslave
* Description : SPI master 1 byte transmission function for esp8266 slave,
* transmit 1byte data to esp8266 slave buffer needs 16bit transmission ,
* first byte is command 0x04 to write slave buffer, second byte is data
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
* uint8 data- transmitted data
*******************************************************************************/
void spi_byte_write_espslave(uint8 spi_no,uint8 data)
{
uint32 regvalue;
if(spi_no>1) return; //handle invalid input number
while(READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR);
SET_PERI_REG_MASK(SPI_USER(spi_no), SPI_USR_MOSI);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_USR_MISO|SPI_USR_ADDR|SPI_USR_DUMMY);
//SPI_FLASH_USER2 bit28-31 is cmd length,cmd bit length is value(0-15)+1,
// bit15-0 is cmd value.
//0x70000000 is for 8bits cmd, 0x04 is eps8266 slave write cmd value
WRITE_PERI_REG(SPI_USER2(spi_no),
((7&SPI_USR_COMMAND_BITLEN)<<SPI_USR_COMMAND_BITLEN_S)|4);
WRITE_PERI_REG(SPI_W0(spi_no), (uint32)(data));
SET_PERI_REG_MASK(SPI_CMD(spi_no), SPI_USR);
}
/******************************************************************************
* FunctionName : spi_byte_read_espslave
* Description : SPI master 1 byte read function for esp8266 slave,
* read 1byte data from esp8266 slave buffer needs 16bit transmission ,
* first byte is command 0x06 to read slave buffer, second byte is recieved data
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
* uint8* data- recieved data address
*******************************************************************************/
void spi_byte_read_espslave(uint8 spi_no,uint8 *data)
{
uint32 regvalue;
if(spi_no>1) return; //handle invalid input number
while(READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR);
SET_PERI_REG_MASK(SPI_USER(spi_no), SPI_USR_MISO);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_USR_MOSI|SPI_USR_ADDR|SPI_USR_DUMMY);
//SPI_FLASH_USER2 bit28-31 is cmd length,cmd bit length is value(0-15)+1,
// bit15-0 is cmd value.
//0x70000000 is for 8bits cmd, 0x06 is eps8266 slave read cmd value
WRITE_PERI_REG(SPI_USER2(spi_no),
((7&SPI_USR_COMMAND_BITLEN)<<SPI_USR_COMMAND_BITLEN_S)|6);
SET_PERI_REG_MASK(SPI_CMD(spi_no), SPI_USR);
while(READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR);
*data=(uint8)(READ_PERI_REG(SPI_W0(spi_no))&0xff);
}
/******************************************************************************
* FunctionName : spi_slave_init
* Description : SPI slave mode initial funtion, including mode setting,
* IO setting, transmission interrupt opening, interrupt function registration
* Parameters : uint8 spi_no - SPI module number, Only "SPI" and "HSPI" are valid
*******************************************************************************/
void spi_slave_init(uint8 spi_no)
{
uint32 regvalue;
if(spi_no>1)
return; //handle invalid input number
//clear bit9,bit8 of reg PERIPHS_IO_MUX
//bit9 should be cleared when HSPI clock doesn't equal CPU clock
//bit8 should be cleared when SPI clock doesn't equal CPU clock
////WRITE_PERI_REG(PERIPHS_IO_MUX, 0x105); //clear bit9//TEST
if(spi_no==SPI){
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CMD_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA0_U, 1);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_DATA1_U, 1);//configure io to spi mode
}else if(spi_no==HSPI){
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 2);//configure io to spi mode
PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 2);//configure io to spi mode
}
//regvalue=READ_PERI_REG(SPI_FLASH_SLAVE(spi_no));
//slave mode,slave use buffers which are register "SPI_FLASH_C0~C15", enable trans done isr
//set bit 30 bit 29 bit9,bit9 is trans done isr mask
SET_PERI_REG_MASK( SPI_SLAVE(spi_no),
SPI_SLAVE_MODE|SPI_SLV_WR_RD_BUF_EN|
SPI_SLV_WR_BUF_DONE_EN|SPI_SLV_RD_BUF_DONE_EN|
SPI_SLV_WR_STA_DONE_EN|SPI_SLV_RD_STA_DONE_EN|
SPI_TRANS_DONE_EN);
//disable general trans intr
//CLEAR_PERI_REG_MASK(SPI_SLAVE(spi_no),SPI_TRANS_DONE_EN);
CLEAR_PERI_REG_MASK(SPI_USER(spi_no), SPI_FLASH_MODE);//disable flash operation mode
SET_PERI_REG_MASK(SPI_USER(spi_no),SPI_USR_MISO_HIGHPART);//SLAVE SEND DATA BUFFER IN C8-C15
//////**************RUN WHEN SLAVE RECIEVE*******************///////
//tow lines below is to configure spi timing.
SET_PERI_REG_MASK(SPI_CTRL2(spi_no),(0x2&SPI_MOSI_DELAY_NUM)<<SPI_MOSI_DELAY_NUM_S) ;//delay num
os_printf("SPI_CTRL2 is %08x\n",READ_PERI_REG(SPI_CTRL2(spi_no)));
WRITE_PERI_REG(SPI_CLOCK(spi_no), 0);
/////***************************************************//////
//set 8 bit slave command length, because slave must have at least one bit addr,
//8 bit slave+8bit addr, so master device first 2 bytes can be regarded as a command
//and the following bytes are datas,
//32 bytes input wil be stored in SPI_FLASH_C0-C7
//32 bytes output data should be set to SPI_FLASH_C8-C15
WRITE_PERI_REG(SPI_USER2(spi_no), (0x7&SPI_USR_COMMAND_BITLEN)<<SPI_USR_COMMAND_BITLEN_S); //0x70000000
//set 8 bit slave recieve buffer length, the buffer is SPI_FLASH_C0-C7
//set 8 bit slave status register, which is the low 8 bit of register "SPI_FLASH_STATUS"
SET_PERI_REG_MASK(SPI_SLAVE1(spi_no), ((0xff&SPI_SLV_BUF_BITLEN)<< SPI_SLV_BUF_BITLEN_S)|
((0x7&SPI_SLV_STATUS_BITLEN)<<SPI_SLV_STATUS_BITLEN_S)|
((0x7&SPI_SLV_WR_ADDR_BITLEN)<<SPI_SLV_WR_ADDR_BITLEN_S)|
((0x7&SPI_SLV_RD_ADDR_BITLEN)<<SPI_SLV_RD_ADDR_BITLEN_S));
SET_PERI_REG_MASK(SPI_PIN(spi_no),BIT19);//BIT19
//maybe enable slave transmission liston
SET_PERI_REG_MASK(SPI_CMD(spi_no),SPI_USR);
//register level2 isr function, which contains spi, hspi and i2s events
ETS_SPI_INTR_ATTACH(spi_slave_isr_handler,NULL);
//enable level2 isr, which contains spi, hspi and i2s events
ETS_SPI_INTR_ENABLE();
}
/* =============================================================================================
* code below is for spi slave r/w testcase with 2 r/w state lines connected to the spi master mcu
* replace with your own process functions
* find "add system_os_post here" in spi_slave_isr_handler.
* =============================================================================================
*/
#ifdef SPI_SLAVE_DEBUG
/******************************************************************************
* FunctionName : hspi_master_readwrite_repeat
* Description : SPI master test function for reading and writing esp8266 slave buffer,
the function uses HSPI module
*******************************************************************************/
os_timer_t timer2;
void hspi_master_readwrite_repeat(void)
{
static uint8 data=0;
uint8 temp;
os_timer_disarm(&timer2);
spi_byte_read_espslave(HSPI,&temp);
temp++;
spi_byte_write_espslave(HSPI,temp);
os_timer_setfn(&timer2, (os_timer_func_t *)hspi_master_readwrite_repeat, NULL);
os_timer_arm(&timer2, 500, 0);
}
#endif
/******************************************************************************
* FunctionName : spi_slave_isr_handler
* Description : SPI interrupt function, SPI HSPI and I2S interrupt can trig this function
some basic operation like clear isr flag has been done,
and it is availible for adding user coder in the funtion
* Parameters : void *para- function parameter address, which has been registered in function spi_slave_init
*******************************************************************************/
#include "gpio.h"
#include "user_interface.h"
#include "mem.h"
static uint8 spi_data[32] = {0};
static uint8 idx = 0;
static uint8 spi_flg = 0;
#define SPI_MISO
#define SPI_QUEUE_LEN 8
os_event_t * spiQueue;
#define MOSI 0
#define MISO 1
#define STATUS_R_IN_WR 2
#define STATUS_W 3
#define TR_DONE_ALONE 4
#define WR_RD 5
#define DATA_ERROR 6
#define STATUS_R_IN_RD 7
//init the two intr line of slave
//gpio0: wr_ready ,and
//gpio2: rd_ready , controlled by slave
void ICACHE_FLASH_ATTR
gpio_init()
{
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
//PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
GPIO_OUTPUT_SET(0, 1);
GPIO_OUTPUT_SET(2, 0);
//GPIO_OUTPUT_SET(4, 1);
}
void spi_slave_isr_handler(void *para)
{
uint32 regvalue,calvalue;
static uint8 state =0;
uint32 recv_data,send_data;
if(READ_PERI_REG(0x3ff00020)&BIT4){
//following 3 lines is to clear isr signal
CLEAR_PERI_REG_MASK(SPI_SLAVE(SPI), 0x3ff);
}else if(READ_PERI_REG(0x3ff00020)&BIT7){ //bit7 is for hspi isr,
regvalue=READ_PERI_REG(SPI_SLAVE(HSPI));
CLEAR_PERI_REG_MASK(SPI_SLAVE(HSPI),
SPI_TRANS_DONE_EN|
SPI_SLV_WR_STA_DONE_EN|
SPI_SLV_RD_STA_DONE_EN|
SPI_SLV_WR_BUF_DONE_EN|
SPI_SLV_RD_BUF_DONE_EN);
SET_PERI_REG_MASK(SPI_SLAVE(HSPI), SPI_SYNC_RESET);
CLEAR_PERI_REG_MASK(SPI_SLAVE(HSPI),
SPI_TRANS_DONE|
SPI_SLV_WR_STA_DONE|
SPI_SLV_RD_STA_DONE|
SPI_SLV_WR_BUF_DONE|
SPI_SLV_RD_BUF_DONE);
SET_PERI_REG_MASK(SPI_SLAVE(HSPI),
SPI_TRANS_DONE_EN|
SPI_SLV_WR_STA_DONE_EN|
SPI_SLV_RD_STA_DONE_EN|
SPI_SLV_WR_BUF_DONE_EN|
SPI_SLV_RD_BUF_DONE_EN);
if(regvalue&SPI_SLV_WR_BUF_DONE){
GPIO_OUTPUT_SET(0, 0);
idx=0;
while(idx<8){
recv_data=READ_PERI_REG(SPI_W0(HSPI)+(idx<<2));
spi_data[idx<<2] = recv_data&0xff;
spi_data[(idx<<2)+1] = (recv_data>>8)&0xff;
spi_data[(idx<<2)+2] = (recv_data>>16)&0xff;
spi_data[(idx<<2)+3] = (recv_data>>24)&0xff;
idx++;
}
//add system_os_post here
GPIO_OUTPUT_SET(0, 1);
}
if(regvalue&SPI_SLV_RD_BUF_DONE){
//it is necessary to call GPIO_OUTPUT_SET(2, 1), when new data is preped in SPI_W8-15 and needs to be sended.
GPIO_OUTPUT_SET(2, 0);
//add system_os_post here
//system_os_post(USER_TASK_PRIO_1,WR_RD,regvalue);
}
}else if(READ_PERI_REG(0x3ff00020)&BIT9){ //bit7 is for i2s isr,
}
}
#ifdef SPI_SLAVE_DEBUG
void ICACHE_FLASH_ATTR
set_miso_data()
{
if(GPIO_INPUT_GET(2)==0){
WRITE_PERI_REG(SPI_W8(HSPI),0x05040302);
WRITE_PERI_REG(SPI_W9(HSPI),0x09080706);
WRITE_PERI_REG(SPI_W10(HSPI),0x0d0c0b0a);
WRITE_PERI_REG(SPI_W11(HSPI),0x11100f0e);
WRITE_PERI_REG(SPI_W12(HSPI),0x15141312);
WRITE_PERI_REG(SPI_W13(HSPI),0x19181716);
WRITE_PERI_REG(SPI_W14(HSPI),0x1d1c1b1a);
WRITE_PERI_REG(SPI_W15(HSPI),0x21201f1e);
GPIO_OUTPUT_SET(2, 1);
}
}
void ICACHE_FLASH_ATTR
disp_spi_data()
{
uint8 i = 0;
for(i=0;i<32;i++){
os_printf("data %d : 0x%02x\n\r",i,spi_data[i]);
}
//os_printf("d31:0x%02x\n\r",spi_data[31]);
}
void ICACHE_FLASH_ATTR
spi_task(os_event_t *e)
{
uint8 data;
switch(e->sig){
case MOSI:
disp_spi_data();
break;
case STATUS_R_IN_WR :
os_printf("SR ERR in WRPR,Reg:%08x \n",e->par);
break;
case STATUS_W:
os_printf("SW ERR,Reg:%08x\n",e->par);
break;
case TR_DONE_ALONE:
os_printf("TD ALO ERR,Reg:%08x\n",e->par);
break;
case WR_RD:
os_printf("WR&RD ERR,Reg:%08x\n",e->par);
break;
case DATA_ERROR:
os_printf("Data ERR,Reg:%08x\n",e->par);
break;
case STATUS_R_IN_RD :
os_printf("SR ERR in RDPR,Reg:%08x\n",e->par);
break;
default:
break;
}
}
void ICACHE_FLASH_ATTR
spi_task_init(void)
{
spiQueue = (os_event_t*)os_malloc(sizeof(os_event_t)*SPI_QUEUE_LEN);
system_os_task(spi_task,USER_TASK_PRIO_1,spiQueue,SPI_QUEUE_LEN);
}
os_timer_t spi_timer_test;
void ICACHE_FLASH_ATTR
spi_test_init()
{
os_printf("spi init\n\r");
spi_slave_init(HSPI);
os_printf("gpio init\n\r");
gpio_init();
os_printf("spi task init \n\r");
spi_task_init();
#ifdef SPI_MISO
os_printf("spi miso init\n\r");
set_miso_data();
#endif
//os_timer_disarm(&spi_timer_test);
//os_timer_setfn(&spi_timer_test, (os_timer_func_t *)set_miso_data, NULL);//wjl
//os_timer_arm(&spi_timer_test,50,1);
}
#endif
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