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Modified Matrix to work with MAX7221: changing latching from rising edge to falling edge.

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This commit is contained in:
David A. Mellis 2008-05-10 05:02:09 +00:00
parent 8588045f7f
commit 114a19c9a2
1 changed files with 6 additions and 6 deletions
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12
hardware/libraries/Matrix/Matrix.cpp
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@ -116,13 +116,13 @@ void Matrix::putByte(uint8_t data)
// sets register to a byte value for all screens // sets register to a byte value for all screens
void Matrix::setRegister(uint8_t reg, uint8_t data) void Matrix::setRegister(uint8_t reg, uint8_t data)
{ {
digitalWrite(_pinLoad, HIGH); // begin digitalWrite(_pinLoad, LOW); // begin
for(uint8_t i = 0; i < _screens; ++i){ for(uint8_t i = 0; i < _screens; ++i){
putByte(reg); // specify register putByte(reg); // specify register
putByte(data); // send data putByte(data); // send data
} }
digitalWrite(_pinLoad, LOW); // latch in data digitalWrite(_pinLoad, HIGH); // latch in data
digitalWrite(_pinLoad, HIGH); // end digitalWrite(_pinLoad, LOW); // end
} }
// syncs row of display with buffer // syncs row of display with buffer
@ -132,13 +132,13 @@ void Matrix::syncRow(uint8_t row)
// uint8_t's can't be negative, so don't test for negative row // uint8_t's can't be negative, so don't test for negative row
if (row >= 8) return; if (row >= 8) return;
digitalWrite(_pinLoad, HIGH); // begin digitalWrite(_pinLoad, LOW); // begin
for(uint8_t i = 0; i < _screens; ++i){ for(uint8_t i = 0; i < _screens; ++i){
putByte(8 - row); // specify register putByte(8 - row); // specify register
putByte(_buffer[row + (8 * i)]); // send data putByte(_buffer[row + (8 * i)]); // send data
} }
digitalWrite(_pinLoad, LOW); // latch in data digitalWrite(_pinLoad, HIGH); // latch in data
digitalWrite(_pinLoad, HIGH); // end digitalWrite(_pinLoad, LOW); // end
} }
/****************************************************************************** /******************************************************************************