LPC1112FHN33/203,5 NXP Semiconductors, LPC1112FHN33/203,5 Datasheet - Page 313

• Manufacturer Part Number: LPC1112FHN33/203,5
• Description: ARM Microcontrollers - MCU Cortex-M0 16kB flash up to 4 kB SRAM
• Manufacturer: NXP Semiconductors

Specifications of LPC1112FHN33/203,5

• Rohs: yes
• Core: ARM Cortex M0
• Processor Series: LPC1112
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 16 KB
• Data Ram Size: 4 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 3.6 V
• Operating Temperature Range: - 65 C to + 150 C
• Package / Case: HVQFN-33
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 260

NXP Semiconductors
17.4 API description
UM10398
User manual
Fig 67. CAN API pointer structure
0x1FFF 1FF8
0x1FFF 1FFC
0x1FFF 2000
17.4.1 Calling the C_CAN API
A fixed location in ROM contains a pointer to the ROM driver table i.e. 0x1FFF 1FF8. This
location is the same for all LPC11Cxx parts. The ROM driver table contains pointer to the
CAN API table. Pointers to the various CAN API functions are stored in this table. CAN
API functions can be called by using a C structure.
Figure 67
RAM from address 0x1000 0050 to 0x1000 00B8 is used by the CAN API. This address
range should not be used by the application. For applications using the on-chip CAN API,
the linker control file should be modified appropriately to prevent usage of this area for
application’s variable storage.
In C, the structure with the function list that is referenced to call the API functions looks as
follows:
typedef struct _CAND {
} CAND;
void (*init_can)
void (*isr)
void (*config_rxmsgobj) (CAN_MSG_OBJ * msg_obj);
uint8_t (*can_receive)
void (*can_transmit) (CAN_MSG_OBJ * msg_obj);
void (*config_canopen) (CAN_CANOPENCFG * canopen_cfg);
void (*canopen_handler) (void);
void (*config_calb)
Ptr to Device Table 0
Ptr to Device Table 1
Ptr to C_CAN API Table
Ptr to Device Table n
ROM Driver Table
illustrates the pointer mechanism used to access the on-chip CAN API. On-chip
…
All information provided in this document is subject to legal disclaimers.
(void);
(uint32_t * can_cfg, uint8_t isr_ena);
(CAN_CALLBACKS * callback_cfg);
(CAN_MSG_OBJ * msg_obj);
Rev. 12 — 24 September 2012
Chapter 17: LPC11Cxx C_CAN on-chip drivers
Device n
Ptr to Function 0
Ptr to Function 1
Ptr to Function 2
Ptr to Function n
…
canopen_handler
config_canopen
config_rxmsgobj
can_transmit
can_receive
config_calb
C_CAN API
init_can
isr
UM10398
© NXP B.V. 2012. All rights reserved.
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