Jiří Hudec / M5451

Simple control for ST M5451 LED driver.

Sample usage

#include "mbed.h"
#include "M5451.h"

M5451 m5451(D8, D7);

void toggleOneByOne(){
    for(char i = 0; i < m5451.outputs(); i++){
        m5451.toggleBit(i);
        m5451.update();
        wait_ms(250);
        m5451.toggleBit(i);
    }
}

int main() {
    while(1) {
        m5451.setAllBits(0);
        toggleOneByOne();
        m5451.setAllBits(1);
        toggleOneByOne();
    }
}

Files at this revision

API Documentation at this revision

Revision 1:db1e69c22bc6, committed 2020-03-01

Comitter:
jirrick
Date:
Sun Mar 01 11:41:57 2020 +0000
Parent:
0:b21b3517a1d6
Commit message:
add toggleBit

Changed in this revision

M5451.cpp Show annotated file Show diff for this revision Revisions of this file
M5451.h Show annotated file Show diff for this revision Revisions of this file 
--- a/M5451.cpp	Sun Mar 01 10:20:26 2020 +0000
+++ b/M5451.cpp	Sun Mar 01 11:41:57 2020 +0000
@@ -6,7 +6,7 @@
     _state = 0ULL;
 }
 
-int M5451::outputs() {
+short M5451::outputs() {
     return JIRRICK_M5451_OUTPUTS;
 }
 
@@ -14,16 +14,23 @@
     _state = state;
 }
 
-void M5451::setBit(char position, char value){
-    if (position < JIRRICK_M5451_OUTPUTS)
+void M5451::setBit(short position, short value){
+    if (position >= 0 && position < JIRRICK_M5451_OUTPUTS)
     {
         uint64_t value64 = value;
         _state = (_state & ~(1ULL << position)) | (value64 << position);
     }
 }
 
-void M5451::setAllBits(char value){
-    for(char i = 0; i < JIRRICK_M5451_OUTPUTS; i++){
+void M5451::toggleBit(short position){
+    if (position >= 0 && position < JIRRICK_M5451_OUTPUTS)
+    {
+        _state ^= 1ULL << position;
+    }
+}
+
+void M5451::setAllBits(short value){
+    for(short i = 0; i < JIRRICK_M5451_OUTPUTS; i++){
         setBit(i, value);
     }
 }
@@ -31,8 +38,8 @@
 void M5451::update() {
     _send(1); //START BIT
     uint64_t input = _state;
-    for(char i = 0; i < JIRRICK_M5451_OUTPUTS; i++){
-        char value = (input & 1ULL);
+    for(short i = 0; i < JIRRICK_M5451_OUTPUTS; i++){
+        short value = (input & 1ULL);
         _send(value);
         input = input >> 1;
     }
@@ -42,7 +49,7 @@
     return _state;
 }
 
-void M5451::_send(char bit) {
+void M5451::_send(short bit) {
     _dataPin = (bit % 2);
     wait_us(JIRRICK_M5451_WAIT);
     _clockPin = 1;

--- a/M5451.h	Sun Mar 01 10:20:26 2020 +0000
+++ b/M5451.h	Sun Mar 01 11:41:57 2020 +0000
@@ -9,10 +9,11 @@
 class M5451 {
 public:
     M5451(PinName dataPin, PinName clockPin);
-    int outputs();
+    short outputs();
     void setState(uint64_t state);
-    void setBit(char position, char value);
-    void setAllBits(char value);
+    void setBit(short position, short value);
+    void toggleBit(short position);
+    void setAllBits(short value);
     void update();
     uint64_t getState();
   
@@ -20,7 +21,7 @@
     DigitalOut _dataPin;
     DigitalOut _clockPin;
     uint64_t _state;
-    void _send(char bit);
+    void _send(short bit);
 };
  
 #endif
\ No newline at end of file