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| 型號(hào)： | PPSMMANUAL |
| 英文描述： | PPSMMANUAL |
| 中文描述： | PPSMMANUAL |
| 文件頁(yè)數(shù)： | 169/187頁(yè) |
| 文件大小： | 1616K |
| 代理商： | PPSMMANUAL |
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33-4
Device Drivers
Programmer’s Manual
33.2.1
Pen Initialization
Syntax
void
PenDevInit
(void)
Description
This function initializes SPI master and all the ports that are used for corresponding device driver library will be created.
sampling.
M68328ADS implementation:
Port J is used to control the transistor network connected to the touch panel.
The default initialization values for port J are to set all pins to be output I/O There are 2 system configuration drivers:
For SPI Master, the control register, 0xFFF802, is set for the following:
M68EZ328ADS implementation:
ADS version
Q3
Q4
Q5
Q6
CS
M68328ADS
PJ3
PJ1
PJ2
PJ0
PJ7
M68EZ328ADS
PD3
PD1
PD2
PD0
PE3
Table 31-2 Port J Assignment
Port J
address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Direction
Register
0xFFF428
1
x
x
x
1
33.1.1
1
1
Boot Strap Driver (boot.s)
Select Register
0xFFF42B
1
x
x
x
1
1
1
Table 31-3 SPIM Assignment
SPIM Control Register, 0xFFF802
Bit Position
Default Value
(binary)
Data Rate
15 - 13
0 1 0
SPIM Enable
9
1
Exchange Bit
8
0
SPIM Interrupt Enable
6
1
Phase Shift
5
0
Polarity
4
0
Clock Count
3 - 0
1 1 1 1
Personal Portable System Manager
Programmer’s Manual
Device Drivers
33-1
Chapter 33 Device Drivers
PPSM supports device drivers that are either hardware dependent or third-party
vendor dependent. These device drivers include:
System configuration drivers
Pen input driver
LCD driver
Handwriting recognition driver
Font driver
UART driver
In compilation, PIXEL_1 or PIXEL_2 needs to be defined so that the
33.1
System Configuration Drivers
Boot Strap Driver
Interrupt handler installation for the MC68328.
Description
The boot strap code is responsible for initialization of the MC68328 internal
devices and to map chip-selects for the ROM and RAM of the hardware system
at boot time. Different hardware memory configuration and system requires
different boot strap code. An example boot strap code is included in PPSM
device driver library to demonstrate how to boot strap and initialize the chip-
selects for the M68328ADS system. Please refer to
Chapter 34 - Linker
Specification File
and
hardware configuration mapping.
for more details on
For hardware characteristics of the MC68328 processor, please refer to the
MC68328 Integrated Processor User’s Manual, MC68328UM/AD
33.1.2
User Interrupt Handler Installation Driver (irptdev.c)
Description
This interrupt handler device driver allows users to install their own interrupt
handlers for certain kinds of interrupt.
Users can replace the default handler with their interrupt handler in the device
driver to perform exception handling. Since PPSM does not manage or monitor
these user-defined handlers, care must be taken when installing them. Please
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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