57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#define TAILLE_MEMOIRE_I2C 256
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#define TAILLE_MESSAGE_ENVOI_MAX 32
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byte memoire_I2C[TAILLE_MEMOIRE_I2C];
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byte memoire_I2C_index=0;
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bool nouveau_message=false;
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void onRequest(){
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uint32_t taille_envoi;
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taille_envoi = min (TAILLE_MEMOIRE_I2C-memoire_I2C_index, TAILLE_MESSAGE_ENVOI_MAX);
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Wire.write(&memoire_I2C[memoire_I2C_index], taille_envoi);
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memoire_I2C_index++;
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if(memoire_I2C_index>=TAILLE_MEMOIRE_I2C){
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Serial.printf("memoire_I2C_index>=TAILLE_MEMOIRE_I2C\n");
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}
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}
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void onReceive(int len){
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memoire_I2C_index = Wire.read();
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while(Wire.available()){
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nouveau_message=true;
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memoire_I2C[memoire_I2C_index] = Wire.read();
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memoire_I2C_index++;
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}
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}
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void I2C_Slave_init(int addr){
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Wire.onReceive(onReceive);
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Wire.onRequest(onRequest);
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Wire.begin(addr);
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}
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bool I2C_Slave_nouveau_message(){
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if(nouveau_message){
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nouveau_message=false;
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return true;
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}
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return false;
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}
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void I2C_envoi_8bits(byte value, char adresse){
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memoire_I2C[adresse] = value;
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}
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void I2C_envoi_16bits(int16_t value, char adresse){
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memoire_I2C[adresse] = value;
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}
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void I2C_envoi_32bits(int32_t value, char adresse){
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memoire_I2C[adresse] = value >> 24;
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memoire_I2C[adresse+1] = (value >> 16) & 0xFF;
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memoire_I2C[adresse+2] = (value >> 8) & 0xFF;
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memoire_I2C[adresse+3] = value & 0xFF;
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}
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