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1595c69890
It does add some complexity to the code. I may be going through a chain of calls just to turn the CS pin on, for instance. Hopefully I'm not going too crazy with this. Anyway, this means that I can control the ports from a SIMM electrical test routine using the same types of functions that the actual programming controlling code would use, without having to duplicate a bunch of port definitions and bit manipulation. I made sure to add all the functions I can think of needing to the ports module. We'll see if I got them all!
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/*
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* ports.h
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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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#ifndef PORTS_H_
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#define PORTS_H_
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#include <stdbool.h>
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#include <stdint.h>
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// Under normal operation, we will only be using the address pins as outputs.
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// The data pins will switch back and forth between all inputs and all outputs.
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// The CS/OE/WE pins will always be outputs.
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// The pullups will all be turned off.
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// So you should use Ports_SetAddressOut(),
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// Ports_SetDataOut(),
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// Ports_SetAddressDDR() [once at the beginning]
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// Ports_SetDataDDR(),
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// and Ports_ReadDataInData
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//
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// The reason I have implemented all this functionality is to give me complete
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// control over all the pins for other use cases, such as a SIMM electrical test.
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// By playing with pull-ups and inputs and outputs, I should be able to detect
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// many shorted output/input scenarios. So even though these functions are overkill,
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// they will be useful for diagnostics.
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void Ports_Init(void);
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void Ports_SetAddressOut(uint32_t data);
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void Ports_AddressOut_RMW(uint32_t data, uint32_t modifyMask);
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void Ports_SetDataOut(uint32_t data);
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void Ports_DataOut_RMW(uint32_t data, uint32_t modifyMask);
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void Ports_SetCSOut(bool data);
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void Ports_SetOEOut(bool data);
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void Ports_SetWEOut(bool data);
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void Ports_SetAddressDDR(uint32_t ddr);
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void Ports_AddressDDR_RMW(uint32_t ddr, uint32_t modifyMask);
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void Ports_SetDataDDR(uint32_t ddr);
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void Ports_DataDDR_RMW(uint32_t ddr, uint32_t modifyMask);
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void Ports_SetCSDDR(bool ddr);
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void Ports_SetOEDDR(bool ddr);
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void Ports_SetWEDDR(bool ddr);
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void Ports_AddressPullups_RMW(uint32_t pullups, uint32_t modifyMask);
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void Ports_DataPullups_RMW(uint32_t pullups, uint32_t modifyMask);
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void Ports_SetCSPullup(bool pullup);
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void Ports_SetOEPullup(bool pullup);
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void Ports_SetWEPullup(bool pullup);
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uint32_t Ports_ReadAddress(void);
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uint32_t Ports_ReadData(void);
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bool Ports_ReadCS(void);
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bool Ports_ReadOE(void);
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bool Ports_ReadWE(void);
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#endif /* PORTS_H_ */
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