Frank Duignan / Mbed OS NRF52832_ili9341

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main.cpp@80:ff42f77928ad, 2021-02-03 (annotated)

Committer:
f3d
Date:
Wed Feb 03 11:30:30 2021 +0000
Revision:
80:ff42f77928ad
Parent:
79:a022f7789a49
Child:
81:7087ba9d18bb
Basic driver working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
f3d 80:ff42f77928ad 1 /* ILI9341 interface for the NRF52832
hyungo 77:9140e10d79ee 2 */
hyungo 77:9140e10d79ee 3
Jonathan Austin 0:2757d7abb7d9 4 #include "mbed.h"
f3d 80:ff42f77928ad 5 #include "display.h"
hyungo 77:9140e10d79ee 6 /* Serial */
hyungo 77:9140e10d79ee 7 #define BAUDRATE 9600
f3d 79:a022f7789a49 8 Serial g_Serial_pc(P0_18, P0_14, BAUDRATE);
hyungo 77:9140e10d79ee 9
hyungo 77:9140e10d79ee 10 /* DigitalOut */
hyungo 77:9140e10d79ee 11 #define LED_ON 0
hyungo 77:9140e10d79ee 12 #define LED_OFF 1
f3d 80:ff42f77928ad 13
f3d 79:a022f7789a49 14 DigitalOut g_DO_LedBlue(A5, LED_OFF);
f3d 80:ff42f77928ad 15 Display display;
f3d 80:ff42f77928ad 16
f3d 80:ff42f77928ad 17 uint32_t prbs()
f3d 80:ff42f77928ad 18 {
f3d 80:ff42f77928ad 19 // This is an unverified 31 bit PRBS generator
f3d 80:ff42f77928ad 20 // It should be maximum length but this has not been verified
f3d 80:ff42f77928ad 21 static uint32_t shift_register=0xaa551199;
f3d 80:ff42f77928ad 22 unsigned long new_bit=0;
f3d 80:ff42f77928ad 23 static int busy=0; // need to prevent re-entrancy here
f3d 80:ff42f77928ad 24 if (!busy)
f3d 80:ff42f77928ad 25 {
f3d 80:ff42f77928ad 26 busy=1;
f3d 80:ff42f77928ad 27 new_bit= ((shift_register & (1<<27))>>27) ^ ((shift_register & (1<<30))>>30);
f3d 80:ff42f77928ad 28 new_bit= ~new_bit;
f3d 80:ff42f77928ad 29 new_bit = new_bit & 1;
f3d 80:ff42f77928ad 30 shift_register=shift_register << 1;
f3d 80:ff42f77928ad 31 shift_register=shift_register | (new_bit);
f3d 80:ff42f77928ad 32 busy=0;
f3d 80:ff42f77928ad 33 }
f3d 80:ff42f77928ad 34 return shift_register & 0x7ffffff; // return 31 LSB's
f3d 80:ff42f77928ad 35 }
f3d 80:ff42f77928ad 36 uint32_t random(uint32_t lower,uint32_t upper)
f3d 80:ff42f77928ad 37 {
f3d 80:ff42f77928ad 38 return (prbs()%(upper-lower))+lower;
f3d 80:ff42f77928ad 39 }
hyungo 77:9140e10d79ee 40 int main(void) {
f3d 80:ff42f77928ad 41
f3d 80:ff42f77928ad 42 int Count;
f3d 80:ff42f77928ad 43 display.begin();
f3d 79:a022f7789a49 44
hyungo 77:9140e10d79ee 45 while(true) {
f3d 80:ff42f77928ad 46 g_Serial_pc.printf("LED Toggle\r\n");
hyungo 77:9140e10d79ee 47 g_DO_LedBlue = !g_DO_LedBlue;
f3d 80:ff42f77928ad 48
f3d 80:ff42f77928ad 49 for (Count = 0; Count < 200; Count++)
f3d 80:ff42f77928ad 50 {
f3d 80:ff42f77928ad 51 display.drawRectangle(random(0,240),random(0,320),random(0,240),random(0,320),random(0,0xffff));
f3d 80:ff42f77928ad 52 }
f3d 80:ff42f77928ad 53 display.fillRectangle(0,0,240,320,0);
f3d 80:ff42f77928ad 54 for (Count = 0; Count < 200; Count++)
f3d 80:ff42f77928ad 55 {
f3d 80:ff42f77928ad 56
f3d 80:ff42f77928ad 57 display.fillRectangle(random(0,240),random(0,320),random(0,240),random(0,320),random(0,0xffff));
f3d 80:ff42f77928ad 58
f3d 80:ff42f77928ad 59 }
f3d 80:ff42f77928ad 60 display.fillRectangle(0,0,240,320,0);
f3d 80:ff42f77928ad 61 for (Count = 0; Count < 200; Count++)
f3d 80:ff42f77928ad 62 {
f3d 80:ff42f77928ad 63 display.drawCircle(random(0,240),random(0,240),random(0,320),random(0,0xffff));
f3d 80:ff42f77928ad 64
f3d 80:ff42f77928ad 65 }
f3d 80:ff42f77928ad 66 display.fillRectangle(0,0,240,320,0);
f3d 80:ff42f77928ad 67 for (Count = 0; Count < 50; Count++)
f3d 80:ff42f77928ad 68 {
f3d 80:ff42f77928ad 69 display.fillCircle(random(0,240),random(0,320),random(0,120),random(0,0xffff));
f3d 80:ff42f77928ad 70
f3d 80:ff42f77928ad 71 }
f3d 80:ff42f77928ad 72 display.fillRectangle(0,0,240,320,0);
f3d 80:ff42f77928ad 73
Jonathan Austin 0:2757d7abb7d9 74 }
hyungo 77:9140e10d79ee 75
hyungo 77:9140e10d79ee 76 return 0;
Jonathan Austin 0:2757d7abb7d9 77 }