LCD display-tm1640 chip driver

Tm1640 chip driver

Din: serial data input. The input data changes at the low level of sclk and is transmitted at the high level of sclk.

Sclk: input data on the rising edge.

/* Includes ------------------------------------------------------------------ */# include "stm8s. H "# include" Global. H "# include" string. H "/* Private typedef restart * // * Private define restart */# define data_commend 0x40 // Data Control Command 0100 0000 automatic address 0100 fixed address # define disp_close 0x80 // display off/* Private macro Optional * // * private variables variable */uint8_t displaybuff [14]; // uint8_t displaybufffinal [14]; uint8_t dispopenvalue = 0x8f; // display the opening 1000 1011 pulse width as 10/16 const uint8_t mmap_tab [] = {0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80};/* Private function prototypes --------------------------------------- -------- * // * Private functions --------------------------------------------------------- */static void dispdata_mmap (); // void dispdata_trans (); // void dispdata_bittrans (); // bitwise address translation/* Public Functions ----------------------------------------------------------*//*************************** **************************************** * *********** function: initialize port parameters: return value: no *************************************** ******* * ********************************/Void tm1640_port_init (void) {gpio_init (tm1640_clk_gpio_port, tm1640_clk_gpio_pin, gpio_mode_out_pp_high_slow); tm1640_din_out_mode ;} /*************************************** **************************************** function: delay function MS Ms parameter: return value: no *************************************** **************************************** /void tm1640_delayms (uint8_t MS) {unsigned short JJ; For (JJ = 1; JJ <= MS; JJ ++) {Nop ();}} /*************************************** **************************************** function: command Transmission start flag parameter: return value: no *************************************** **************************************** /void tm1640_start () {latency; tm1640_delayms (5); tm1640_din_high; tm1640_delayms (5); tm1640_clk_high; tm1640_delayms (10); tm1640_din_low; latency (5 );} /************** **************************************** * ************************ Function: command Transmission end parameter: return value: no *************************************** **************************************** /void tm1640_end () {latency; tm1640_delayms (5); tm1640_din_low; tm1640_delayms (5); tm1640_clk_high; tm1640_delayms (10); tm1640_din_high; latency (5 );} /*************************************** *********************************** * *** Function: Write a byte function parameter: DAT --- return value of one byte of data written: no *************************************** **************************************** /void tm1640_write_byte (unsigned char dat) {uint8_t I; // start the first byte of valid Dio input as the instruction // valid chip selection signal for (I = 0; I <8; I ++) {tm1640_clk_low; if (DAT & 0x01) {tm1640_din_high;} else {tm1640_din_low; // write low position first} tm1640_delayms (10); tm1640_clk_high; // The rising edge of the clock, send a data tm1640_delayms (10); dat >>= 1;} Tm1640_clk_low; tm1640_delayms (5 );} /*************************************** **************************************** function: fixed address 1: display function parameters: * dat --- display data array pointer return value: no *************************************** **************************************** /void tm1640_write_string () {uint8_t I; dispdata_mmap (); // dispdata_trans (); // dispdata_bittrans (); tm1640_start (); Round (data_commend); tm1640_end (); TM1 640_delayms (5); tm1640_start (); tm1640_write_byte (0xc0); for (I = 0; I <14; I ++) {tm1640_write_byte (displaybuff [I]); // terminate (g_systemdisplaydata.buffer [I]);} tm1640_end (); tm1640_delayms (5); tm1640_start (); terminate (dispopenvalue); // enable tm1640_end ();} /*************************************** **************************************** function: parameter of the initialization function of tm1640: no return value: No ************************ **************************************** * **************/Void tm1640_init (void) {tm1640_port_init (); tm1640_start (); tm1640_write_byte (dispopenvalue); // display OFF 1000 0000 tm1640_end (); tm1640_delayms (5 );} /*************************************** **************************************** function: display ing function (due to unreasonable hardware design, the corresponding conversion is required) return value: no *************************************** **************************************** /STAT IC void dispdata_mmap () {uint8_t I, j; for (I = 0; I <= 13; I ++) {if (I <= 7) // convert the first 8 bytes along the diagonal line {for (j = 0; j <= 7; j ++) {If (g_systemdisplaydata.buffer [J] & mmap_tab [I]) {displaybuff [I] | = mmap_tab [J];} else {displaybuff [I] & = ~ Mmap_tab [J] ;}} else {displaybuff [I] = g_systemdisplaydata.buffer [I] ;}}// void dispdata_trans () // segment address translation // {// displaybufffinal [0] = displaybuff [3]; // displaybufffinal [1] = displaybuff [4]; // displaybufffinal [2] = displaybuff [12]; // displaybufffinal [3] = displaybuff [10]; // displaybufffinal [4] = displaybuff [1]; // displaybufffinal [5] = displaybuff [2]; // displaybufffinal [6] = displaybuff [9]; // displaybufffinal [7] = displaybuff [13]; // displaybufffinal [8] = displaybuff [0]; // displaybufffinal [9] = displaybuff [11]; // displaybufffinal [10] = displaybuff [8]; // displaybufffinal [11] = displaybuff [7]; // displaybufffinal [12] = displaybuff [5]; // displaybufffinal [13] = displaybuff [6]; ///} // void dispdata_bittrans () // bit address conversion // {// uint8_t I; // memset (displaybuff, 0, sizeof (displaybuff); // for (I = 0; I <14; I ++) // {// displaybuff [I] | = (displaybufffinal [I] & mmap_tab [1])> 1 ); // bit 0 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [0]) <1 ); // bit 1 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [2]); // bit 2 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [3]); // bit 3 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [6])> 2 ); // bit 4 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [7])> 2 ); // bit 5 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [5]) <1 ); // bit 6 // displaybuff [I] | = (displaybufffinal [I] & mmap_tab [4]) <3); // bit 7 //}//}