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43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/*
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* simm_electrical_test.c
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*
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* Created on: Nov 26, 2011
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* Author: Doug
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*/
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#include "simm_electrical_test.h"
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#include "../ports.h"
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#define SIMM_HIGHEST_ADDRESS_LINE 18
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int SIMMElectricalTest_Run(void)
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{
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// Returns number of errors found
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int numErrors = 0;
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Ports_Init();
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// First check for anything shorted to ground. Set all lines as inputs with a weak pull-up resistor.
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// Then read the values back and check for any zeros. This would indicate a short to ground.
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Ports_SetAddressDDR(0);
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Ports_SetDataDDR(0);
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Ports_AddressPullups_RMW((1UL << (SIMM_HIGHEST_ADDRESS_LINE + 1)) - 1, (1UL << (SIMM_HIGHEST_ADDRESS_LINE + 1)) - 1);
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Ports_DataPullups_RMW(0xFFFFFFFFUL, 0xFFFFFFFFUL);
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// TODO: Wait a sec?
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if (Ports_ReadAddress() != (1UL << (SIMM_HIGHEST_ADDRESS_LINE + 1)) - 1)
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{
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// TODO: Log all these errors somewhere?
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numErrors++;
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}
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if (Ports_ReadData() != 0xFFFFFFFFUL)
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{
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// TODO: Log all these errors somewhere?
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numErrors++;
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}
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return numErrors;
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}
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